The solutions to the equations are
a) The percentage of quokkas that weigh over 15.5 pounds is 2.1 %
b) The percentage of quokkas that weigh uncer 11.9 pounds is 75.9 %
c) Percentage of quokkas that weigh between 15.5 and 11.9 pounds 22.0 %
What is a z-score?The relationship between a value and the mean of a set of values is expressed numerically by a Z-score. The Z-score is computed using the standard deviations from the mean. A Z-score of zero indicates that the data point's score and the mean score are identical.
The Z-score is calculated using the formula:
z = (x - μ)/σ
where z: standard score
x: observed value
μ: mean of the sample
σ: standard deviation of the sample
Given data ,
The weights of the quokkas are described by the normal model as
N ( 10 , 2.7 )
So , the mean μ = 10
And , the standard deviation σ = 2.7
a)
The percentage of quokkas that weigh over 15.5 pounds is given by the equation P ( x > 15.5 )
On simplifying the equation , we get
From the z-score formula ,
P ( z > ( 15.5 - 10 ) / 2.7 )
P ( z > 2.037 ) = 0.020825
0.020825 = 2.0825 %
Hence , the percentage of quokkas that weigh over 15.5 pounds is 2.1 %
b)
The percentage of quokkas that weigh uncer 11.9 pounds is given by the equation P ( x < 11.9 )
On simplifying the equation , we get
From the z-score formula ,
P ( z < ( 11.9 - 10 ) / 2.7 )
P ( z < 0.7037 ) = 0.020825
0.75919 = 75.919 %
Hence , the percentage of quokkas that weigh uncer 11.9 pounds is 75.9 %
c)
Percentage of quokkas that weigh between 15.5 and 11.9 pounds is
P ( 11.9 < x < 15.5 )
On simplifying the equation , we get
From the z-score formula ,
P ( 11.9 < x < 15.5 ) = 1 - P ( x < 11.9 ) - P ( x > 15.5 )
P ( 11.9 < x < 15.5 ) = 1 - 0.020825 - 0.75919
P ( 11.9 < x < 15.5 ) = 0.219985
P ( 11.9 < x < 15.5 ) = 22.0 %
Hence , the equations are solved using z-score
To learn more about z-score click :
https://brainly.com/question/25638875
#SPJ1
PLEASE SOMEONE HELP QUICKKK!
The coordinate of the y-intercept of the line y = 4x + 1 is (7.5, 10). And the value of 'k' is 7.5.
What is a linear equation?A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.
The linear equation is given as,
y = mx + c
Where m is the slope of the line and c is the y-intercept of the line.
a) The equation is given as,
y - 4x = 1
y = 4x + 1
Then coordinate of the y-intercept is (0, 1).
b) The equation is given as,
y = 2x + c
From the graph, the y-interept is -3. Then the equation is given as,
y = 2x - 3
At y = 10, the value of 'k' is given as,
10 = 2k - 3
2k = 13
k = 7.5
The coordinate of the y-intercept of the line y = 4x + 1 is (7.5, 10). And the value of 'k' is 7.5.
More about the linear equation link is given below.
https://brainly.com/question/11897796
#SPJ1
The population of deer is growing in a given region, and has a carrying capacity of 2500. If at the initial point of
observation (t = 0), there were 400, and 700 four years later, give the logistic model for the population P, and find the
number of deer after 10 years.
The logistic model for the population P is P = 75x = 400.
The number of deer population after 10 years is 1150.
What is an equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
We have,
Deer:
Population capacity = 2500
Initial population = 400
Population after 4 years = 700
Now,
We can make two ordered pairs:
(0, 400) and (4, 700)
Now,
We can write an equation as,
P = mx + c
m = (700 - 400) / (4 - 0) = 300/4 = 75
And,
(0, 400) = (x, y)
400 = 75 x 0 + c
c = 400
So,
P = 75x + 400
This is the equation for the number of deers after x years.
Now,
The number of deers after 10 years.
x = 10
P = 75 x 10 + 400
P = 750 + 400
P = 1150
Thus,
The number of deer after 10 years is 1150.
Learn more about equations here:
https://brainly.com/question/17194269
#SPJ1
(1/8j+2/3)-(5/3j+9/12)
Answer: -37j-2/24
Step-by-step explanation:
A ship 1 mile from a straight shoreline has a searchlight that rotates at 12 revolutions per minute. How fast is the edge of the bean moving along the shore at the moment it makes an angle pi/4 of with the shore?
The velocity of the bean is 0.63 feet/second
What is angular velocity?Angular velocity is the time rate at which an object rotates or revolves about an axis. Angular velocity is represented by the Greek letter omega (ω) It is measured in angle per unit time; hence, the SI unit of angular velocity is radians per second.
w = tetha/t
1 revolution = 360° = 2π
1 minutes = 60s
w = 12× 2π/60
w = 24×3.14/60
w = 1.26 radian/second
r = d/2
r = 1/2 = 0.5miles
v = wr
v = 1.26 × 0.5
v = 0.63feet/second
therefore the velocity of the bean is 0.63 feet/second.
learn more about angular velocity from
https://brainly.com/question/20432894
#SPJ1
A bag contains quarters, dimes, nickels, and pennies. What is the probability of
pulling out each type of coin at random? Show your work.
Step-by-step explanation:
The probability of pulling out each type of coin at random can be found by dividing the number of coins of that type by the total number of coins in the bag. Let's assume the bag contains n quarters, m dimes, k nickels, and p pennies. The total number of coins in the bag would be n + m + k + p.
The probability of pulling out a quarter would be:
P(quarter) = n / (n + m + k + p)
The probability of pulling out a dime would be:
P(dime) = m / (n + m + k + p)
The probability of pulling out a nickel would be:
P(nickel) = k / (n + m + k + p)
And the probability of pulling out a penny would be:
P(penny) = p / (n + m + k + p)
It's important to note that the sum of the probabilities of all the possible outcomes must equal 1:
P(quarter) + P(dime) + P(nickel) + P(penny) = 1
ASAP!!
Sarah borrowed $29.96 from her uncle and promised to work in his store at $2.60 per hour until the dept was paid. She worked 6 hours on Saturday, 1 3/4 hours on Monday and 1 1/2 hours on Tuesday. How much more money does she still owe to her uncle?
Answer: $5.91
Step-by-step explanation:
Total borrowed = $29.96
Amount earned on Saturday
6 hours x $2.60 = $15.60
Amount earned on Monday
1 3/4 is the same as 1.75
1.75 hours X $2.60 = $4.55
Amount earned on Tuesday
1 1/2 is the same as 1.50
1.50 hours x $2.60 = $3.90
Total amount earned from Saturday, Monday, and Tuesday
$15.60 + $4.55 + $3.90 = $24.05
Amount Sarah owes her uncle
$29.96 borrowed
$24.05 earned
$29.96 - $24.05 = $5.91
Sarah owes $5.91.
How to determine if two verticals are similar
The endpoints of an edge are its end-vertices. When two vertices are endpoints of the same edge, they are said to be neighbouring.
How can the similarity between two graph vertices be determined?The limit of the normalised even iterations of a linear transformation can be used to obtain the similarity matrix. The square matrix in the particular case when G A=G B=G contains the similarity score between the vertices I and j of G as its I j)-th element.
What is the point where two sides meet in common?The combination of two rays with the same terminal is called an angle. The vertex of the angle is the common terminal of the rays, which are referred to as the sides of the angle.
To know more about matrix visit:-
brainly.com/question/28180105
#SPJ1
will give brainliest. A recent conference had 875 people in attendance. In one exhibit room of 60 people, there were 46 teachers and 14 principals. What prediction can you make about the number of principals in attendance at the conference?
A, There were about 204 principals in attendance.
B.There were about 266 principals in attendance.
C. There were about 671 principals in attendance.
D. There were about 815 principals in attendance
Answer:
A, There were about 204 principals in attendance
Step-by-step explanation:
In one exhibit room, there are 14 principals out of 60 people so the ratio is 14 to 60
If the ratio stays the same then, x is the number of principals in attendance at the conference, then
x/875 = 14/60
60x = 14(875)
60x = 12250
x = 12250/60 = 204
hope this helps.
which of the following graphs could represent a graph of a function? select all that apply
Graph A and graph D represents quadratic function and linear function respectively.
What is the graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points. A graph consists of some points and lines between them. The length of the lines and position of the points do not matter.
In the given figure,
In option A graph parabola represents the quadratic function.
In option B graph doe's not represents the function.
In option C graph doe's not represents the function.
In option D graph straight line represents the linear function.
Therefore, option A and option D are the correct answers.
To learn more about the graph visit:
brainly.com/question/14375099.
#SPJ1
assume that register r1 contains 0x20000850. remembering that your ti tm4c123 is little endian, what are the contents of r0 if we execute ldr r0, [r1]
The contents of r0 will be 0x20000851, which is the first byte of the word stored at address 0x20000850.
The TI TM4C123 is a little-endian processor, meaning that it stores data in the memory in reverse order. This means that the first byte of a word will be stored at the lower address, and the last byte at the higher address.
In this example, register r1 contains the address 0x20000850. When we execute the ldr r0, [r1] instruction, the processor will read the value stored in memory at address 0x20000850 and store it in register r0.
Since this is a little-endian processor, the value stored in memory at address 0x20000850 will be the last byte of the word, and the value stored in memory at address 0x20000851 will be the first byte of the word.
This means that the contents of r0 will be 0x20000851, which is the first byte of the word stored at address 0x20000850.
Learn more about order here:
https://brainly.com/question/26591615
#SPJ4
a garden table and a bench cost $1000 combined. The cost of the garden table is three times the cost of the bench. What is the cost of the bench?
Answer:
The cost is 250
Step-by-step explanation:
Let's call the cost of the bench "x". The cost of the garden table is then 3x. The combined cost of the two items is $1000, so we can set up the following equation:
x + 3x = 1000
Combining like terms, we have:
4x = 1000
Dividing both sides by 4, we find:
x = 250
So the cost of the bench is $250.
If a Car traveled 25 miles in 45 minutes, what miles per hour speed was the person in the car traveling? Round to the nearest whole number.
Answer:
33 miles per hour
Step-by-step explanation:
To find the speed of the car in miles per hour, we need to divide the number of miles traveled by the time in hours. We can convert minutes to hours by dividing by 60. So, the time in hours is 45 minutes / 60 minutes/hour = 0.75 hours. Then, we can divide the distance traveled by the time to find the speed:
25 miles / 0.75 hours = 33.33 miles per hour
Rounding to the nearest whole number, the speed of the car was 33 miles per hour.
caculate the intrest earned in 1 year on 2000 at 7 percent
Answer:
140
Step-by-step explanation:
simple interest=principle which is the money, multiply by 7%which is the rate multiply by 1yr which is the time divided by 100
SI=(2000x7x1)
--------------
100
Difference between polynomial and multinational
Answer: A polynomial is an algebraic expression with 1, 2 or 3 variables, whereas, a multinomial is a type of polynomial with 4 or more variables.
Step-by-step explanation:
Find the volume of the solid that results when the region bounded by y=√x , y=0, and x=16 is revolved about the line x=16.
With help of integration, The volume of the solid that results when the region bounded by y=√x , y=0, and x=16 is revolved about the line x=16 will be 42.66 cubic unit.
What exactly is integration?
The process of computing an integral is known as integration. Mathematicians utilise integrals to compute a variety of useful quantities such as areas, volumes, displacement, and so on. When we talk about integrals, we usually imply definite integrals. Antiderivatives are represented by indefinite integrals. Integration, along with differentiation, is one of the two major calculus concepts in mathematics (which measure the rate of change of any function with respect to its variables).
Integral Fundamental
A definite integral is one that has both upper and lower bounds. For X to lie, only a true line may be utilised. The Definite Integral is also known as a Riemann Integral.
From a to b, use ∫f(x)dx
indefinite integral
Integrals are defined without upper and lower limits. It looks like this:
A indefinite Integral is written as:
∫f(x)dx = F(x) + C
Where C might be any constant and the function f(x) is referred to as the integrand.
Now,
for volume of the solid that results when the region bounded by y=√x , y=0, and x=16 is revolved about the line x=16.
volume= ∫√x dx for x=0 to 16
=x*√x/3/2
=64*2/3
=128/3
=42.66 cubic unit
To know more about Integration visit the link
https://brainly.com/question/18125359?referrer=searchResults
#SPJ4
A composition of Math
1. History of Math
2. Math facts
3. Calculation tricks
4. Common mistakes in Math
5. Students corner(Sudoku/Puzzle)
6. Career in Math
Mathematics is a computational system developed by the Babylonians.
What is the history of mathematics?Mathematics has its roots in ancient civilizations, such as the Babylonians and Egyptians, who used mathematical concepts for practical purposes such as measuring land, calculating taxes and predicting astronomical events. The ancient Greeks made major contributions to mathematics with the development of geometry by Euclid and the formulation of mathematical proofs by Pythagoras and his followers.
The 17th and 18th centuries saw a major development in calculus by mathematicians like Isaac Newton and Gottfried Wilhelm Leibniz, which revolutionized the field and opened up new avenues of scientific investigation. In the 19th and 20th centuries, mathematicians such as Georg Cantor, Kurt Gödel, and Alan Turing made major contributions to the foundations of mathematics and the development of computer science.
Learn more about mathematics:https://brainly.com/question/27235369
#SPJ1
Kelly can run 1/2 mile in 3 minutes. How far does
Kelly run in 1 minute if he runs at the same pace the
entire time?
Answer:
880 feet; 0.166666666 miles or ⅙ of a mile
Step-by-step explanation:
First convert miles to feet so 1 mile is 5280 feet.
Now divide it by 2 because we're working with half a mile per 3 minutes.
Now we know that Kelly can run 2640 feet every 3 minutes. Divide that by three to get her pace for every minute and we know that she runs 880feet per minute. In miles that would be 0.166 or ⅙ of a mile
Step-by-step explanation:
the ratio is
1/2 mile per 3 minutes
= 1/2 / 3
now, we need to keep the value of that ratio unchanged but still transform the ratio (= a fraction) so that we get as ultimate denominator 1 instead of 3 (how far did he run in 1 minute).
what do we need to do to transform 3 to 1 ?
we need to divide by 3.
and because we have to keep the ratio value, we have to devide also the numerator by 3 :
1/2 / 3 × 1/3 / 1/3 = (1/2 × 1/3) / (3 × 1/3) = 1/6 / 1
so, we can read from the result directly :
when running with the same pace (ratio) for 1 minute, he will run 1/6 mile.
Will give you 40 points if you can solve this in 20 minutes
Answer:
total costs = 0.93n +220 revenue = 2.90n profit = 1.97n -220 cost for 320 bags: $517.60 revenue for 320 bags: $928 profit for 320 bags: $410.40Step-by-step explanation:
Given that bags of peanuts cost $0.93 each, booth rental costs $220 for the week, and your selling price is $2.90 per bag, you want expressions for cost, revenue, and profit, and you want these values when sales are 320 bags of peanuts for the week.
CostThe total cost is the sum of fixed and variable costs. The fixed cost is the cost of booth rental, $220. The variable cost is the per-bag cost of peanuts, multiplied by the number of bags.
total cost = 0.93n +220
RevenueThe revenue is the selling price, multiplied by the number of bags sold:
revenue = 2.90n
ProfitProfit is the difference between revenue and cost.
profit = revenue -cost
profit = (2.90n) -(0.93n +220)
profit = 1.97n -220
320 bags soldcost = 0.93·320 +220 = 297.60 +220 = $517.60 . . . total costs
revenue = 2.90·320 = $928.00 . . . revenue
profit = 1.97·320 -220 = 630.40 -220 = $410.40 . . . profit
__
Additional comment
The attached graph shows the cost (red), revenue (green), and profit (blue) curves. The vertical line identifies the values of these for 320 units sold.
It takes sales of 112 bags to pay the costs (break even).
<95141404393>
Someone walk me through this, please.
The final value of the investment is $689.10. Fill the table accordingly.
How to determine the final value of the investment?Compound interest is the interest on a loan or deposit calculated based on both the initial principal and the accumulated interest from previous periods.
First year
Interest earned = 9/100 * $580 = $52.20
Second year
Balance + Interest = $580 + $52.20
Total balance = $632.20 (Note: Total balance = Balance + Interest )
Interest earned = 9/100 * $632.20 = $56.90
Third year
Balance + Interest = $632.20 + $56.90
Total balance = $689.10
Learn more about compound interest on:
brainly.com/question/24274034
#SPJ1
factorise this : 9x^2-4y^2
Answer:
(3x + 2y) (3x - 2y)
Step-by-step explanation:
a² - b² = (a + b) (a - b)
where a = 3x and b = 2y
Find the perimeter of the triangle whose vertices are (1,−8)
, (−3,0)
, and (−2,−7)
. Write the exact answer. Do not round.
Using the distance formula, we can find the lengths of the sides of the triangle:
Side 1: From (1, −8) to (−3, 0)
d = √[(−3 − 1)² + (0 − (−8))²]
d = √[16 + 64]
d = √80
Side 2: From (−3, 0) to (−2, −7)
d = √[(−2 − (−3))² + ((−7) − 0)²]
d = √[1 + 49]
d = √50
Side 3: From (−2, −7) to (1, −8)
d = √[(1 − (−2))² + ((−8) − (−7))²]
d = √[9 + 1]
d = √10
To find the perimeter, we add the lengths of the three sides:
Perimeter = √80 + √50 + √10
Therefore, the exact perimeter of the triangle is:
Perimeter = √80 + √50 + √10
Calculate the simple interest earned on an investment of $9710 at a semiannual rate of 3.6% for 4 years. Write your answer to the nearest cent.
Answer:
Step-by-step explanation:
To calculate the simple interest earned on an investment of $9710 at a semiannual rate of 3.6% for 4 years, we need to use the formula:
I = Prt
where I is the interest, P is the principal (initial investment), r is the interest rate (as a decimal), and t is the time (in years).
In this case, the principal is $9710, the interest rate is 3.6% per year, or 0.036/2 = 0.018 per 6-month period (since the interest is compounded semiannually), and the time is 4 years, or 8 periods of 6 months each.
Plugging in these values, we get:
I = $9710 x 0.018 x 8 = $1392.24
Therefore, the simple interest earned on the investment is $1392.24. Rounding to the nearest cent, the answer is $1392.24.
What is the equivalent expression for 3(2×+5)
Answer:
There are many expressions equivalent to this.
Step-by-step explanation:
Let's solve the equation.
In the parentheses, you cannot do ×+, so I will assume that × is meant to be a variable, x.
You can use distributive property to solve this.
3(2x + 5)
3 × 2x + 6x
3 × 5 = 15
6x + 15 cannot be done.
So, the answer to the equation is 6x + 15.
An Equivalent Expression
An equivalent expression can be 2(3x + 7.5)
Let's solve it.
2 × 3x = 6x
2 + 7.5 = 15
So, the answer to this equation is 6x + 15.
6x + 15 = 6x + 15.
2(3x + 7.5) = 3(2x + 5)
Find the area of the shaded region. Round your answer to one decimal place, if necessary. Note: The figure is not drawn to scale.
The area of shaded region would be 15.7 in² which is a difference between the area of the circle and area of the triangle.
What is the Area of a Triangle?The entire space filled by a triangle's three sides in a two-dimensional plane is defined as its area. The fundamental formula for calculating the area of a triangle is A = 1/2 b h.
We know that;
The area of an equilateral triangle = (√3/4) a²
Here, a = 3
Hence, The area of the given triangle = (√3/4) × 3²
The area of the given triangle = 0.43 × 9 = 3.9 in²
And, The area of the circle = π (d/2)²
Here d = 5
The area of the circle = π (5/2)² = 19.63 in²
Thus, The area of shaded region = area of the circle - area of the triangle
The area of shaded region = 19.63 - 3.9 = 15.7 in²
Learn more about the triangles here:
brainly.com/question/2773823
#SPJ1
The complete question is shown in figure.
How does a domain restriction placed on a non-invertible function affect its inverse?
Drag a function or an interval into each box to correctly complete the statement.
When the domain of the non-invertible function f(x)=(x+5)2−8 is [−5,∞), the inverse of the function is Response area, and the domain of the inverse function is Response area.
Answer: When the domain of the non-invertible function f(x)=(x+5)^2−8 is [−5,∞), the inverse of the function is not defined, and the domain of the inverse function is empty.
Step-by-step explanation:
Raul is choosing from two plans at his gym. He can either pay a set price
for each visit, or he can buy a membership, which would have a lower
price per visit in addition to a membership fee. Which model could be
used to determine which plan would be less expensive based on the
number of visits he makes?
PLEASE HELP THIS IS DUE TODAY I WILL GIVE THE BRAINLIEST IF IT IS CORRECT IF IT IS SPAM I WILL REPORT YOU AND BAN YOU IMMEDIATELY!
From the two plans for a set price the second graph in this issue is the right one.
A linear function is what?The following is the definition of a linear function's slope and intercept:
y = mx + b.
where:
The rate of change is represented by the slope m.
The starting quantity is represented by the intercept b.
We have it for the plan with the fixed price:
Compared to the other plan, the slope is higher.
There is no intercept.
As a result, it is less expensive for fewer trips.
We have the following for the plan with the set price plus the fee:
Compared to the other plan, the slope is smaller.
There is an intercept that exceeds zero.
As a result, paying for more visits results in lower expenditures.
Hence, the second graph in this issue is the right one.
Learn more about linear equation here:
https://brainly.com/question/29739212
#SPJ1
9 ft
12 ft
9 ft
9 ft
19.8 ft
15 ft
What is the surface area of the figure? Round to the nearest square foot.
The surface area of the entire figure is 1764 ft².
Describe Rectangular Prism?A rectangular prism is a three-dimensional shape that has six faces, where each face is a rectangle. It is also sometimes referred to as a rectangular cuboid.
A rectangular prism has eight vertices (corners), 12 edges, and six faces. The opposite faces of a rectangular prism are parallel and congruent, and the angles formed between adjacent faces are all right angles (90 degrees).
The volume of a rectangular prism can be calculated by multiplying the length, width, and height of the prism. The formula for the volume of a rectangular prism is given by V = l x w x h, where V is the volume, l is the length, w is the width, and h is the height of the prism.
We can begin by finding the dimensions of the rectangular prism and the cuboid. Since the side of the rectangular prism is 9 ft, it must be the height of the entire figure. We can find the dimensions of the cuboid by subtracting the height of the rectangular prism from the height of the entire figure:
height of cuboid = 19.8 ft - 9 ft = 10.8 ft
width of cuboid = 15 ft
length of cuboid = 12 ft
Now we can find the surface area of the entire figure by adding the surface areas of the rectangular prism and the cuboid. The surface area of a rectangular prism is given by:
2lw + 2lh + 2wh
where l, w, and h are the length, width, and height of the prism, respectively. Substituting in the values we have:
surface area of rectangular prism = 2(9)(9) + 2(9)(19.8 - 9) + 2(9)(15) = 486 + 162 + 270 = 918 ft²
The surface area of a cuboid is given by:
2lw + 2lh + 2wh
where l, w, and h are the length, width, and height of the cuboid, respectively. Substituting in the values we have:
surface area of cuboid = 2(15)(9) + 2(12)(9) + 2(15)(12) = 270 + 216 + 360 = 846 ft²
Therefore, the surface area of the entire figure is:
surface area = surface area of rectangular prism + surface area of cuboid = 918 + 846 = 1764 ft²
To know more about area visit:
https://brainly.com/question/355912
#SPJ1
A couple found a house selling for $113,500. The taxes on the house are $1300 per year, and insurance is $340 per year. They are requesting a conventional loan from the local bank. The bank is currently requiring a 15% down payment and 3 points, and the interest rate is 10%. The couple's gross monthly income is $4950. They have more than 10 monthly payments remaining on a car, a boat, and furniture. The total monthly payments for these items is $420. Their bank will approve a loan that has a total monthly mortgage payment of principal, interest, property taxes, and homeowners' insurance that is less than or equal to 28% of their adjusted monthly income.
Complete parts a) through g) below.
a) Determine the required down payment.
The amount of the down payment that is required to be paid is = $17025
How to solve for the down paymentThe down payment is the initial amount that the buyer has to offer for the merchandise before they would later have to make the full payment. The down payment is a sign of seriousness on the part of a buyer
The amount that the house is selling for is $113,500.
The percentage that is to be considered for the down payment is 15 percent of the total amount.
This is given as 15 percent of $113,500.
down payment is 0.15 * $113,500
= $17025
Read more on down payment here:https://brainly.com/question/1698287
#SPJ1
As shown above, a classic deck of cards is made up of 52 cards. Suppose one card is selected at random and
calculate the following probabilities.
Round solutions to three decimal places, if necessary.
The probability that a 3 or a Heart is selected is
The probability that a face card or Club is selected is
The probability that the selected card is both a face card and a Heart is
Step-by-step explanation:
a probability is always the ratio
desired cases / totally possible cases
when pulling one card out of 52 cards, the totally possible cases for the result are 52.
now, all we need to do is "counting" or calculating the desired cases for each problem.
a 3 or a heart is pulled.
it is important to really read this carefully : 3 OR a heart. not 3 and a heart (that would ask for the probability to pull the 3 of hearts card, as no other card would satisfy the criteria).
we have 13 cards of heart.
and we have 4 cards of the value 3. but one of them is already included in the 13 cards of heart.
so, we need to add only 3 to these 13 and get 16 desired cards.
the probability is therefore
16/52 = 4/13 = 0.307692308... ≈ 0.308
a face card OR a club is pulled.
face cards are Jack, Queen and King (the ones with faces on the cards). so, 3 per suit, 4 suits = 12 cards.
we have 13 cards of club.
3 of these cards are already in the group of face cards, so we need to add only 10 to to this group for the desired cases. and the probability is
22/52 = 11/26 = 0.423076923... ≈ 0.423
a face card AND a heart is pulled.
we have 13 cards of heart.
and now it is AND to be a face card (not OR like in the previous question).
there are only 3 face cards of heart. the probability is
3/52 = 0.057692308... ≈ 0.058
Suppose you spin the spinner below 5 times. A spinner is shown with equal sections A, B, and C. The pointer is on section B. Which probabilities do you need in order to calculate P(getting A on 2 or fewer spins)? P(0 successes) P(1 success) P(2 successes) P(3 successes) P(4 successes) P(5 successes)
Answer:
I think the answer is B. Sorry if I'm wrong I really tried :(
Step-by-step explanation: