Suppose that among the 5000 students at a high school, 1200 are taking an online class and 1700 prefer watching basketball to watching football. Taking an online class and preferring basketball are independent. How many students are taking an online course and prefer basketball to football

Actually, not all of the options are correct. The statement "Most economic data can be modeled as a higher-order ARMA(p, q) model" is not entirely accurate. While it is true that many economic time series exhibit some degree of autocorrelation and can be modeled using ARMA models, not all economic data can be accurately represented by these models.

In fact, some time series may require more complex models such as state-space models, VAR models, or GARCH models to capture the underlying dynamics.

Regarding the other statements:

Spikes in the autocorrelation function do indicate autoregressive terms, as autocorrelation measures the correlation between a time series and its past values.

Spikes in the partial-autocorrelation function do indicate moving-average terms, as partial-autocorrelation measures the correlation between a time series and its past values, controlling for the effects of intermediate lags.

For an ARMA(p, q) model, the autocorrelation function should show an abrupt stop at lag p, indicating the presence of p autoregressive terms. The partial-autocorrelation function should show an abrupt stop at lag q, indicating the presence of q moving-average terms.

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Step-by-step explanation:

x-axis intercept occurs when y = 0  ( obviously)

5x  - 4(0) = - 4

5x = - 4

x = - 4/5

Since the x-component is independent of both u and v, the cylinder is circular. Therefore, the surface is a circular cylinder.

To see why, we can first simplify the vector equation by multiplying out the terms:

r(u, v) = ui + (3u - uv)j + (4k + 4uk + 6vk)

We can then identify the x and y components as functions of u and v:

x(u, v) = u
y(u, v) = 3u - uv

These are the equations for a plane in 3D space. However, the z-component is a function of both u and v, which means the surface is not a plane.

To identify the shape of the surface, we can look at the z-component:

z(u, v) = 4 + 4u + 6v

This is the equation for a plane with a slope of 6 in the v-direction and an intercept of 4 + 4u in the z-direction. Since the slope in the u-direction is 0, the surface is a cylinder.

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It is more difficult to establish nonspuriousness in quasi-experiment designs, where do not use randomization to assign subjects to treatment and comparison groups. So, option(c) is right.

The prefix quasi means "resembling". Thus, quasi-experimental research is a type of research which resembles to experimental research but it is not a true experimental research. These designs are similar to true experiments but lack random assignment to experimental and control groups. A true experiment, a quasi-experimental design, aims to establish a cause-and-effect relationship between an independent and a dependent variable. Aim of these experiments is to evaluate interventions but without use of randomization. Subjects are assigned to groups based on non-random criteria. Since the independent variable is measured, not manipulated, they are best thought of as correlational research. Thus, the correct answer is to determine a relationship between two variables that is not caused by variation in a third variable, i.e, Nonspuriousness.

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Complete question :

Because quasi-experimental designs do not use randomization to assign subjects to treatment and comparison groups, it is more difficult to establish:

a. Association

b. Time order

c. Nonspuriousness

d. Causal mechanism

e. Context

Assuming that you can choose only one type of sandwich, one size, one type of bread, and any combination of fillings, you can personalize your sandwich in the following way : 5 (types of sandwich) x 3 (sizes) x 4 (types of bread) x 2^6 (choices of fillings) = 5 x 3 x 4 x 64 = 3840

So, you can personalize your sandwich in 3840 different ways by choosing one type of sandwich, one size, one type of bread, and any combination of six different fillings.
Hi! I'd be happy to help you determine the number of ways you can personalize your sandwich at this shop.

1. Sandwich type: There are 5 types of sandwiches to choose from.
2. Sandwich size: There are 3 different sizes available.
3. Bread type: You can select from 4 different kinds of bread.

Now, let's consider the fillings. Since there are 6 fillings, each one can either be included or not included. This results in 2 options (yes or no) for each filling.

To calculate the total number of personalized sandwiches, we can multiply the options for each aspect of the sandwich:

5 (types) * 3 (sizes) * 4 (breads) * 2^6 (fillings) = 5 * 3 * 4 * 64 = 3840

Therefore, you can personalize your sandwich in 3840 different ways.

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The number of independent variables that must be controlled depends on the specific movement being performed and the goals of the individual performing the movement.

The number of independent variables that must be controlled when an individual completes a movement depends on the complexity of the movement and the context in which it is being performed. However, some common independent variables that are often controlled when an individual completes a movement include:

Kinematics: the position, velocity, and acceleration of the body parts involved in the movement.

Dynamics: the forces and torques acting on the body during the movement.

Environmental factors: the physical characteristics of the environment in which the movement is being performed, such as gravity, friction, and obstacles.

Cognitive factors: the mental processes involved in planning and executing the movement, such as attention, decision-making, and memory.

Feedback: the sensory information that is received during the movement, such as proprioceptive feedback from the muscles and joints, and visual feedback from the environment.

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Answer:

.75 / 3 = x / 25

.75(25) = 3x

3x = 18.75, so x = 6.25 inches

= 6 1/4 inches

Thus, the probability decreases as the number of GSIs or the number of available slots increases. For example, if there are only 2 GSIs and 4 available slots, the probability of them choosing the same slot is 1/16 or 0.0625.

The probability that all GSIs choose the same office hour slot can be found by dividing the number of favorable outcomes by the total number of possible outcomes.

Let's assume that there are n GSIs and m available office hour slots. Each GSI has m choices for their office hour slot, and since they choose at random, each choice is equally likely. Therefore, the total number of possible outcomes is m^n.

Now, let's consider the favorable outcomes, i.e., the scenarios in which all GSIs choose the same slot. There are m ways to choose the common slot, and since all GSIs must choose it, the number of favorable outcomes is 1.

Therefore, the probability of all GSIs choosing the same office hour slot is:

P(all GSIs choose same slot) = favorable outcomes / total outcomes
P(all GSIs choose same slot) = 1 / m^n

This probability decreases as the number of GSIs or the number of available slots increases. For example, if there are only 2 GSIs and 4 available slots, the probability of them choosing the same slot is 1/16 or 0.0625.

However, if there are 10 GSIs and 10 available slots, the probability drops to 1/10^10 or 0.00000001.

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To provide you with an answer, let's consider the terms "probability distribution," "number of automobiles," and "Lakeside Olds dealer."

A probability distribution is a mathematical function that describes the likelihood of different possible outcomes in an experiment.

In this case, the experiment is observing the number of automobiles lined up at a Lakeside Old dealer at opening time (7:30 a.m.) for service.
To create the probability distribution for this scenario, we would first need to collect data on the number of automobiles lined up at the dealer at opening time over a certain period. Let's assume we have collected this data:
Number of automobiles:

Probability
0: 0.1
1: 0.2
2: 0.3
3: 0.2
4: 0.1
5: 0.1
This table represents the probability distribution for the number of automobiles lined up at a Lakeside Olds dealer at opening time for service.

The probabilities sum up to 1 (100%) as they should in any probability distribution.
For example, based on this distribution, there is a 10% chance that there will be no automobiles in line, a 20% chance that there will be 1 automobile, a 30% chance that there will be 2 automobiles, and so on.
This probability distribution helps the Lakeside Olds dealer understand and predict the number of automobiles they can expect at opening time, which can be useful for planning and resource allocation.

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To solve this problem, we can use Table 1 (which is a table of values for the cumulative distribution function of the binomial distribution).

(a) To find P(3 < y < 7), we need to calculate the probability of getting between 4 and 6 successes (inclusive) in 10 trials, where the probability of success in each trial is 0.4.

Using Table 1, we can find these probabilities by looking up the values for the cumulative distribution function (CDF) of the binomial distribution. Specifically, we need to find P(y ≤ 6) and P(y ≤ 3), and then subtract the latter from the former to get the probability of getting between 4 and 6 successes.

To find P(y ≤ 6), we look up the row for n = 10 and p = 0.4, and then find the value in the column for y = 6. This value is 0.9688.

To find P(y ≤ 3), we look up the row for n = 10 and p = 0.4, and then find the value in the column for y = 3. This value is 0.3823.

Subtracting P(y ≤ 3) from P(y ≤ 6), we get:

P(4 ≤ y ≤ 6) = P(y ≤ 6) - P(y ≤ 3)
= 0.9688 - 0.3823
= 0.5865

Therefore, the probability of getting between 4 and 6 successes (inclusive) in 10 trials, where the probability of success in each trial is 0.4, is 0.5865.

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Answer: i got 779.16?

Step-by-step explanation:

sorry..

Answer:

ITS C

Step-by-step explanation:

20+10=30

30x25=750!

The alternate hypothesis that indicates the mean of the x2 population is smaller than that of the x1 population is H1: μ2 < μ1, which can be tested using a two-sample t-test.

When conducting a test for the difference of means for two independent populations x1 and x2, the alternate hypothesis that would indicate that the mean of the x2 population is smaller than that of the x1 population is:

H1: μ2 < μ1

Where H1 represents the alternate hypothesis, μ1 represents the mean of population x1, and μ2 represents the mean of population x2. The symbol "<" indicates that the mean of population x2 is smaller than the mean of population x1.

In other words, this alternate hypothesis states that there is a significant difference between the means of the two populations, with the mean of population x2 being lower than the mean of population x1. This hypothesis can be tested using a two-sample t-test, where the null hypothesis assumes that there is no significant difference between the means of the two populations.

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A Type I error is committed if we make an incorrect decision when the null hypothesis is true. The answer is d.

A Type I error is a statistical term used in hypothesis testing, and it occurs when a null hypothesis is rejected when it is actually true. In other words, it's the error of concluding that there is a significant difference between two groups when in fact there is no difference.

This error is denoted by the symbol alpha (α) and is often set at 0.05 or 0.01. The probability of committing a Type I error decreases as the significance level is lowered. However, this also increases the risk of committing a Type II error, which is the error of failing to reject a null hypothesis when it is actually false.

In statistical hypothesis testing, it's important to strike a balance between these two errors by selecting an appropriate level of significance that minimizes the likelihood of both Type I and Type II errors. Hence, d. is the correct answer.

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There is no relationship between the variables shown by the scatterplot.

A scatter plot is a form of graph that demonstrates the relationships between two variables. On the graph, each data point is displayed as a point, and the two variables are shown as lines on the x- and y-axes.

When there is no association between the two variables, the data points are scattered randomly around the graph.  The fact that there is a random scatter of the points shows that there is no relationship between them.

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The result to two decimal places and include the appropriate units. Curve Length = 2 * π * R * (central angle / 360).

To answer your question, I would need more information about the specific problem you are trying to solve, such as the given data or context of the radius and curve length calculation. However, I can provide you with a general approach to these types of problems.
To calculate the radius (R) and express it to two decimal places, you would typically use a formula or relationship involving the radius, and then round the final value to two decimal places. For example, if you were given the circumference (C) of a circle, you would use the formula:
R = C / (2 * π)
Then, you would round the result to two decimal places and include the appropriate units (e.g., meters, centimeters, etc.).
To calculate the circular curve length, you would typically use the formula:
Curve Length = 2 * π * R * (central angle / 360)
Where R is the radius and the central angle is given in degrees. Once again, round the result to two decimal places and include the appropriate units.

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Thus, the probability of getting at least 5 questions correct by guessing randomly on a 20-question multiple-choice test with 4 possible answers for each question is approximately 0.074 or 7.4%.

To calculate the probability of getting at least 5 questions correct, we need to use the binomial distribution formula. This formula calculates the probability of getting a specific number of successes in a fixed number of trials, given a specific probability of success.

The formula for the probability of getting at least 5 successes in 20 trials with a probability of success of 1/4 is:

P(X ≥ 5) = 1 - P(X < 5)

where X is the number of correct answers.

Using the binomial distribution formula, we can calculate the probability of getting less than 5 correct answers as:

P(X < 5) = ΣP(X = k) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4)

= (0.75)^20 + 20(0.25)(0.75)^19 + (20*19/2)(0.25)^2(0.75)^18 + (20*19*18/6)(0.25)^3(0.75)^17 + (20*19*18*17/24)(0.25)^4(0.75)^16

= 0.926

Therefore, the probability of getting at least 5 questions correct is:

P(X ≥ 5) = 1 - P(X < 5)

= 1 - 0.926

= 0.074

So the probability of getting at least 5 questions correct by guessing randomly on a 20-question multiple-choice test with 4 possible answers for each question is approximately 0.074 or 7.4%.

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The percentage that the number of individual packages increased by in the newly designed box is 40%

Here we have,

To find the percentage increase, you first need to find the increase in the number of individual packages in the newly designed box.

This increase is:

= Newly designed box quantity - old box of snacks

= 28 - 20

= 8 individual packages

The percentage increase would then be:

= Increase in packages / Number of packages in old box of snacks

= 8 / 20

= 40%

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complete question:

a box of snacks, contain 20 individual packages. The newly designed box contains 28 individual packages by what percentage did the number of individual packages increase.

If a bin has 8 black balls and 7 white balls. 3 of the balls are drawn at random, the probability of drawing 2 of one color and 1 of the other color is 0.3038 (or about 30.38%).

To find the probability of drawing 2 of one color and 1 of the other color, we need to consider two cases: drawing 2 black balls and 1 white ball, and drawing 2 white balls and 1 black ball.

Case 1: Drawing 2 black balls and 1 white ball
The probability of drawing a black ball on the first draw is 8/15.
The probability of drawing another black ball on the second draw, given that a black ball was already drawn, is 7/14 (since there are now only 7 black balls left out of 14 total balls).
The probability of drawing a white ball on the third draw, given that 2 black balls were already drawn, is 7/13 (since there are now 7 white balls left out of 13 total balls).
Therefore, the probability of drawing 2 black balls and 1 white ball is (8/15) x (7/14) x (7/13) = 0.1519 (rounded to four decimal places).

Case 2: Drawing 2 white balls and 1 black ball
The probability of drawing a white ball on the first draw is 7/15.
The probability of drawing another white ball on the second draw, given that a white ball was already drawn, is 6/14 (since there are now only 6 white balls left out of 14 total balls).
The probability of drawing a black ball on the third draw, given that 2 white balls were already drawn, is 8/13 (since there are now 8 black balls left out of 13 total balls).
Therefore, the probability of drawing 2 white balls and 1 black ball is (7/15) x (6/14) x (8/13) = 0.1519 (rounded to four decimal places).

Since there are two equally likely cases that satisfy the condition (drawing 2 of one color and 1 of the other color), we add the probabilities of the two cases to get the total probability:
0.1519 + 0.1519 = 0.3038 (rounded to four decimal places).

Therefore, the probability of drawing 2 of one color and 1 of the other color is 0.3038 (or about 30.38%).

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The angle of depression from plane to the building for the given situation of taking photographs is equal to 30.027°.

Height for the best photograph = 403ft

Distance from the top of the building = 810 ft

As the given figure represents it is right angled triangle.

Horizontal vision from top of the building to the base are parallel.

Angle of depression and angle of elevation represents alternate angles

This implies,

Measure of angle of depression = Measure of angle of elevation

Let us consider angle of elevation be α .

In right angled triangle,

sin α = ( height of the building ) / (distance from the building)

Substitute the values we have,

⇒ sin α =  403/ 810

⇒ α =  sin⁻¹ ( 0.4975 )

⇒ α =  30.027°

Angle of depression = angle of elevation

⇒  Angle of depression = 30.027°      

Therefore, the angle of depression from the plane to the building is equal to 30.027°.

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To calculate the number of possible passwords that use at least one uppercase letter and at least one lowercase letter, considering only letters and no other characters, we can use the formula: 26ⁿ - 2*26ⁿ, where n represents the length of the password.

Assuming we are only considering passwords that consist of letters (uppercase or lowercase) and no other characters or symbols, we can use the following approach to find the number of possible passwords that use at least one uppercase letter and at least one lowercase letter:

Number of passwords that use both uppercase and lowercase letters

= Total number of possible passwords - Number of passwords that only use lowercase letters - Number of passwords that only use uppercase letters

Number of passwords that use both uppercase and lowercase letters = 26ⁿ - 26ⁿ - 26ⁿ = 26ⁿ - 2*26ⁿ, where n is the length of the password.

Therefore, the number of possible passwords that use at least one uppercase letter and at least one lowercase letter is 26ⁿ - 2*26ⁿ, where n is the length of the password.

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The "significance level" of the test is the probability level necessary for statistical significance prior to using inferential statistics.

Inferential statistics is a branch of statistics that involves making inferences about a population based on a sample. One of the key concepts in inferential statistics is the significance level, which is the probability level below which the results of a statistical test are considered statistically significant.

The significance level, also known as alpha (α), is typically set at 0.05 or 0.01, although other values may be used depending on the specific research question and context. The significance level represents the probability of rejecting the null hypothesis when it is true, which is also known as a Type I error. In other words, it represents the likelihood of concluding that there is a significant effect or difference in the population when there really isn't one.

When conducting a statistical test, researchers calculate a p-value, which represents the probability of obtaining the observed results or more extreme results under the null hypothesis. If the p-value is less than or equal to the significance level, then the results are considered statistically significant, and the null hypothesis is rejected in favor of the alternative hypothesis.

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The height of the can is approximately 8 inches when rounded to the nearest inch.

To find the height of the cylindrical can, we need to use the formula for the volume of a cylinder, which is:

V = πr²h

where V is the volume of the cylinder, r is the radius of the cylinder, and h is the height of the cylinder.

We are given the diameter of the can, which is 5 inches, so we can find the radius by dividing the diameter by 2:

r = 5/2 = 2.5 inches

We are also given the volume of the can, which is approximately 157 cubic inches. We can now substitute the values we have into the formula for the volume of a cylinder and solve for h:

157 = π(2.5)²h

Simplifying and solving for h:

157 = 19.63h

h ≈ 8 inches

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Complete question is:

A company sells snack mix in a cylindrical can. The can has a 5-inch diameter and holds approximately 157in³. of snack mix when it is completely full. How tall, to the nearest inch, is the can?

This gives us an estimated probability of approximately 0.00006, or 0.006%.

Without knowing any further information about the distribution or characteristics of the population, it is impossible to provide an accurate estimate of the probability of observing exactly 39 blue eyed blonde haired people in a group of a certain size.

However, if we assume that the two variables (eye color and hair color) are independent and randomly distributed within the population, then we can use the binomial distribution to estimate the probability of observing exactly 39 people with both blue eyes and blonde hair in a group of a certain size.

The formula for the binomial distribution is:

[tex]P(X = k) = (n choose k) \times p^k \times (1-p)^{(n-k)[/tex]

Where:

P(X = k) is the probability of observing exactly k successes (in this case, 39 blue eyed blonde haired people)

n is the total number of trials (the size of the group)

k is the number of successes (39)

p is the probability of success (the probability of observing someone with blue eyes and blonde hair in the population)

Since we don't have any specific information about the population, we can't determine p directly. However, if we assume that the probability of someone having blue eyes is 0.2 and the probability of someone having blonde hair is 0.25 (which are rough estimates based on global averages), then we can estimate the probability of someone having both blue eyes and blonde hair as:

p = 0.2 × 0.25 = 0.05

Assuming a group size of 1000 people, we can use the binomial distribution to estimate the probability of observing exactly 39 blue eyed blonde haired people as:

[tex]P(X = 39) = (1000 choose 39) \times 0.05^{39} \times (1-0.05)^{(1000-39)}[/tex]

This gives us an estimated probability of approximately 0.00006, or 0.006%. However, it's important to note that this is just an estimate based on certain assumptions, and the true probability could be higher or lower depending on the actual characteristics of the population.

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The Census Bureau conducts a detailed examination of housing and residential finance every ten years.

The Census Bureau's comprehensive housing and residential finance survey, conducted every ten years, is designed to measure levels of residential mortgage debt and provide data for assessing the effectiveness of the current residential finance system in promoting the goal of a decent home and suitable living environment for every American. The study collects data on residential mortgage debt levels and examines the performance of the current residential financing system.

The survey provides national and regional estimates and helps policymakers to make informed decisions about housing and residential finance policies.

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By using the principle of inclusion-exclusion, there are 4 students who are planning to major in both mathematics and computer science.

To solve this problem, we can use the principle of inclusion-exclusion. We start by adding the number of students who plan to major in mathematics (13) and the number of students who plan to major in computer science (14). This gives us a total of 27 students. However, we have counted the students who plan to major in both subjects twice, so we need to subtract this number once to correct for the overcounting.

To find the number of students who plan to major in both subjects, we can subtract the number of students who are not planning to major in either subject from the total number of students in the class. From the problem, we know that there are 5 students who are not planning to major in either subject, so the number of students who are planning to major in at least one of the subjects is 28 - 5 = 23.

Now we can use the principle of inclusion-exclusion. We add the number of students who plan to major in mathematics (13) and the number of students who plan to major in computer science (14), and then subtract the number of students who are planning to major in both subjects (which we want to find). This gives us:

13 + 14 - x = 23

Simplifying, we get:

27 - x = 23

Subtracting 27 from both sides, we get:

-x = -4

Dividing by -1, we get:

x = 4

Therefore, there are 4 students who are planning to major in both mathematics and computer science.

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The maximum capacity of the cup depends on the radius R and is given by[tex](1/3) \times \pi \times R^3[/tex].

To find the maximum capacity of the cup, we need to maximize its volume. The volume of a cone is given by the formula:

[tex]V = (1/3) \times \pi \times r^2 \times h[/tex]

where r is the radius of the base, h is the height, and π is a constant equal to approximately 3.14159.

In our case, the radius of the base is R, and the height of the cone is h.

To find the height h, we need to use the Pythagorean theorem. Let's call the angle CAB θ, and let's call the length of the segment AB x. Then we have:

sin θ = h / R

cos θ = x / R

Using the Pythagorean theorem, we have:

[tex]x^2 + h^2 = R^2[/tex]

Substituting h in terms of θ and x, we get:

[tex]sin^2 \theta \times R^2 + x^2 = R^2\\x^2 = R^2 - R^2 \times sin^2 \theta\\x = R \times cos \theta[/tex]

Now we can express the volume of the cone in terms of θ and x:

[tex]V = (1/3) \times \pi \times R^2 \times h\\V = (1/3) \times \pi \timesR^2 \times sin \theta \times R\\V = (1/3) \times \pi \times R^3 \times sin \theta[/tex]

To find the maximum volume, we need to find the value of θ that maximizes V. We can do this by taking the derivative of V with respect to θ and setting it equal to zero:

[tex]dV/d\theta = (1/3) \times \pi \times R^3 \times cos \theta = 0[/tex]

This gives us cos θ = 0, which implies θ = π/2.

Therefore, the maximum volume of the cone-shaped cup is:

[tex]V = (1/3) \times \pi \times R^3 \times sin(\pi /2) = (1/3) \times\pi \times R^3[/tex]

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Approximately 17.88% of students in this population have a GPA above 3.35.

The grade point averages (GPAs) of college students in this large population follow a normal distribution with a mean of 2.8 and a standard deviation of 0.6. To find the percentage of students with a GPA above 3.35, we will use the z-score formula and standard normal distribution table.
The z-score formula is given by:
z = (X - μ) / σ
where X is the GPA we want to find the percentage for (3.35), μ is the mean (2.8), and σ is the standard deviation (0.6).
Calculating the z-score:
z = (3.35 - 2.8) / 0.6
z ≈ 0.92
Now, we will use the standard normal distribution table (also known as the z-table) to find the area to the left of this z-score (which represents the percentage of students with a GPA of 3.35 or lower). For a z-score of 0.92, the table gives us an area of approximately 0.8212, or 82.12%.
Since we want the percentage of students with a GPA above 3.35, we subtract this value from 100%:
100% - 82.12% ≈ 17.88%
Therefore, approximately 17.88% of students in this population have a GPA above 3.35.

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To determine if the LCM of two numbers is the product of the two numbers using their prime factorization, you need to check if the numbers are coprime.

Coprime numbers have no common prime factors except for 1. If the numbers are coprime, their LCM will be equal to the product of the two numbers.

To tell if the LCM of two numbers is the product of the two numbers, you need to compare the prime factorization of the two numbers. If the prime factors of both numbers are unique (meaning they do not share any common factors), then the LCM will be the product of the two numbers. However, if the two numbers share some common prime factors, then the LCM will have to include those factors at their highest power. So, to find the LCM of the two numbers, you need to take the highest power of each prime factor that appears in either number and multiply them together. If the product of these highest powers matches the product of the two numbers, then the LCM is equal to the product of the two numbers.

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For all customers in my store who buy cameras case and tripod, the conditional probability that he buying a tripod when case is bought is equals to 0.50.

A conditional probability is the probability of a certain event happening when another event is happening. Let us consider the events A and B. The conditional probability of occurrence of A when B already occurred, using formula, [tex] P(A|B )= \frac{ P( A and B)}{P(B)}[/tex]. Now, there are presence of data for all customers in store who buy cameras. Let's consider two events

C : customers who buy a camara case

T : customers who buy a tripod

The probability that customer purchase a camera and case, P(C) = 60% = 0.60

The probability that customer purchase a tripod, P(T) = 40% = 0.40

The probability that customer purchase a case and tripod , P( C = 30% = 0.30

Probability of people who bought only a case and not a tripod, P ( only C) = (60 - 30) = 30%

Percentage of people who bought only a tripod and not a case, P( only T) = (40 - 30) = 10%

Using the conditional probability formula,

Probability of buying tripod when a case is bought [tex]= P(T | C) = \frac{ P(T \cap C) }{ P(C) } [/tex]

[tex]= \frac{ 0.3}{0.6}[/tex]

= 0.50

Hence, required probability is 0.50.

For more information about conditional probability, visit :

https://brainly.com/question/16456973

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