Answer:
0.71 = 71% probability that she or he used the lab on a regular basis.
Step-by-step explanation:
Conditional Probability
We use the conditional probability formula to solve this question. It is
[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]
In which
P(B|A) is the probability of event B happening, given that A happened.
[tex]P(A \cap B)[/tex] is the probability of both A and B happening.
P(A) is the probability of A happening.
In this question:
Event A: Student got an A
Event B: Used the lab on a regular basis.
Probability of an student getting an A:
55% of 40%(go to the lab on a regular basis).
15% of 100 - 40 = 60%(do not go to the lab on a regular basis).
So
[tex]P(A) = 0.55*0.4 + 0.15*0.6 = 0.31[/tex]
Probability of getting an A and using the lab on a regular basis:
55% of 40%, so:
[tex]P(A \cap B) = 0.55*0.4 = 0.22[/tex]
Probability that she or he used the lab on a regular basis.
[tex]P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.22}{0.31} = 0.71[/tex]
0.71 = 71% probability that she or he used the lab on a regular basis.
If you multiply me by 7, add 2 and divide by 3. You get 10. What number am I?
Answer:
4
Step-by-step explanation:
4 times 7 = 28
28 + 2 = 30
30/3 = 10
Answer:
4
Step-by-step explanation:
In numerical terms, write down what the problem says to,
( 7x + 2 ) ÷ 3 = 10
Now solve with inverse operations and simplification,
( 7x + 2 ) ÷ 3 = 10
*3 *3
7x + 2 = 30
-2 -2
7x = 28
÷7 ÷7
x = 4
I NEED A ANWER QUICK
Answer:
It is B because if you have 6 - a negative number you are going to have the closet amount because you have a closer amount to 0
Step-by-step explanation:
Plz mark brainliest
Answer:
3(n-6)
Step-by-step explanation:
Nicole plans to watch 3 movies each month . Write an equation to represent the total number of movies n that she will watch in months .
Make an algebraic expression to determine the 15th term of this pattern:
63, (63+23), (63+23+30), (63+23+30+37), ...
And please, give me a complete answer with a step-by-step explanation.
Answer:
63+23+30+37+44+51+58+65+72+79+86+93+100+107+114.
Step-by-step explanation:
1. according to the condition 63+23; 63+23+30; 63+23+30+37+...; is an arithmetic sequence (note, 63 does not belong to it);
2. according to the condition the 1st term is 63+23; the 2d term is 63+23+30; the 3d term is 63+23+30+37, etc. It means, the next term is calculated with '+7';
3. according to the item '1.' the number '63' was excluded from the initial pattern. It means, the 14th term should be calculated: 23+7*(14-1)=114.
4. if number '63' is included into the given pattern again, the 15th term of the given pattern is 63+0+23+30+...+98.
5. the 15th term is:
63+23+30+37+44+51+58+65+72+79+86+93+100+107+114.
Chester has a coupon for 1/10 off the price of a shirt. If a shirt originally costs $29.30, what discount would Chester receive from using his coupon?
A. $5.86
B. $0.34
C. $26.37
D. $2.93
Answer:
26.37
Step-by-step explanation:
you change 1/10 too 10 percent then you multiply that too 29.30 and you get 2.93 then you subtract 2.93 from 29.30 and you get 26.37 :)
Kate had $140. She spent
2/5 of it. What amount did she spend?
The amount Kate spent $ 56 of the $ 140 she had.
To find out how much Kate spent, we need to calculate 2 / 5 of the total amount she had, which was $ 140.By multiplying fractions we mean the product of a fraction with another number or a fraction. The product of such multiplication could be a fraction or a whole.
To do this, we can multiply $ 140 by the fraction 2 / 5:
= $ 140 * 2 / 5
= $280 / 5
= $ 56
Therefore, Kate spent $ 56 of the $ 140 she had.
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Find 1 2/3 + ( -2 1/2) Show your work.
Answer:
-5/6
Step-by-step explanation:
1 2/3+(-2 1/2)
[tex]\frac{1(3)+2}{3} -\frac{2(2)+1}{2}[/tex]
5/3-5/2
LCD 6
[tex]\frac{5(2)}{3(2)} -\frac{5(3)}{2(3)}[/tex]
10/6-15/6
-5/6
What percentage of the questions did he get right
The radius of a circular swimming pool is 4.5 meters. What is the circumference of this
swimming pool? Use 3.14 for Pi.
Answer:
28.26
Step-by-step explanation:
Answer:
28.26
Step-by-step explanation:
4.5×3.14=14.13×2=28.26
Solve this linear equation:
x/2 + 3/4 = x/8
The pair of pants at Moore's is $80, and the sales tax is 20%. Calculate the final price.(ill give best revews i need done asap)
Answer:
$96
Step-by-step explanation:
Answer:
96
Step-by-step explanation:
80*.20=16
80+16=96
Identify the terms in the following:
a^2 + 2 +7b
Answer:
Answer: -1
Step-by-step explanation:
19.(06.02 LC)
Line IJ has an equation of a line y = -3x - 8. Which of the following could be an equation for a line that is parallel to line 1J? (6 points)
Answer:
y = -3x + 7
Step-by-step explanation:
when they are parallel, they always have the same slope.
choose the best estimate for the mass of an apple
A. 25 g
B. 250 g
C. 1,000 g
D. 2,000 g
boi you bettter helpp.
Answer:
25 or 250 i would go wit 250 but i fr dont know
Step-by-step explanation:
78.84 is what percent of 292?
Pleasee
Answer:
230.2128. Im pretty sure
Step-by-step explanation:
Answer:
27%
Step-by-step explanation:
9. Jenny is selling t-shirts to raise money for the cheerleading team. She sells long sleeve t-shirts
for $18 and short sleeve t-shirts for $12. At the first football game Jenny sells 54 t-shirts and
makes $774. Write and solve a system of equations to find out how many of each she sold.
(let x=the number of long sleeve t-shirts and y=the number of short sleeve t-shirts)
Answer:
54 short sleeve
7 long sleeve
Step-by-step explanation:
54*12=648
774-648= 126
126/18=7
I need help on both of these plss
Answer:
1. When combining 5+2+3 it equals 10; and when solving 5+(2+3) you solve what's in the parenthesis first. So the new problem is 5+(5), which equals 10.
2. Same goes for the second one, 11-2 is 9, then you just add the a because both have the same variable
hope that helped :) have an amazing day
Answer:
for 1: yes they are the same
for 2: true
Step-by-step explanation:
for 1: 5+2+3=10 and 5 +(2+3) = 10 because 2+3=5 so 5+5=10 therefore they are the same
For:2 9=11-2 because 11-2=9
Answers would be appreciated :)
Answer:
a) 39cm, b) 7.5cm, c) 40m, d) 35 ft
Step-by-step explanation:
a) 13(3)=39, b) (5x3)/2=7.5, c) (8x10)/2=40, d) (10x7)/2=35
Answer:
a. 39 cm
b. you cant see b that clearly :(
c. 40
d. 34.99 = 35
so sorry if these arent right
Please tell me the sum 3+5?
Answer:
5+3=8
Step-by-step explanation:
5+3=8
sum is adding
Answer:
The answer is 8
Step-by-step explanation:
If 10 people can paint a fence in 3 days, how long would it take 6 people?
Answer:
5 days.
Step-by-step explanation:
By proportion it will take (10/6) * 3
= 30 /6
= 5 days.
calculate the area of this triangle 18cm, 14cm and height is 11cm
Answer : 99cm^2
Hope this helps
The area of the triangle with a height of 11 cm and a base of 18 cm is,
99 cm².
What is a triangle?A triangle is a three-sided closed-plane figure formed by joining three noncolinear points.
Based on the side property triangles are of three types they are Equilateral triangle, Scalene triangle, and Isosceles triangle.
We also know,
The way of classifying a triangle,
If a² + b² < c² then it is an acute angle triangle.
If a² + b² = c² then it is a right-angle triangle.
If a² + b² ≥ c² then it is an obtuse angle triangle.
The area of a triangle is half times the product of the height and base.
The given triangle has a height of 11 cm and a base of 18 cm.
Therefore, The area of the triangle is,
= (1/2)×18×11 cm².
= 99 cm².
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Please help due in 5 mins
Answer:
2/5 decimal: 0.4. percent:40%
Answer: 0.4 / 40%
Step-by-step explanation:
Decimal 0.4
Percentage 40%
Andrew bought a notebook that costs $6.49 and some books. The total cost was $18.55. How much did the books cost?
Answer:
12.06
Step-by-step explanation:
Answer:
The books cost $12.06
Step-by-step explanation:
You subtract $6.49 - $18.55 = $12.06
So your answer is $12.06
−1/5(x−4)=−2
Solve for x
the answer would be x = 14
Sam and Jimmica have both taken a
speed-reading class and have been
assigned to read a 300-page novel.
Jimmica started reading at noon and read
10 pages per minute. Sam was on page 62
at noon and read 8 pages per minute. Will
Jimmica ever catch up to Sam? Explain
how you found your answer.
Answer: Yes
Step-by-step explanation:
ethan planted a tree that was 1.85 meters tall.several years later , the tree is 5.30 meters tall. which equation can be used to find x, the number of meters the tree has grown
Answer:
eStep-by-step explanation:
The width of a rectangle is 7t-1.5 feet and the length is 1.5t+6 feet. Find the perimeter of the rectangle.
Answer:
17t+9
Step-by-step explanation:
Help ASAP. Find the value of x.
Which expression is equivalent to − 5 ( 8 x + 9 ) − 7 x?
Answer:
12
Step-by-step explanation:
Is -0.75 bigger or 0.55
Answer:
0.55 is bigger
Step-by-step explanation:
-.75 is negative and 0.55 is positive
Answer:
0.55 is bigger
Step-by-step explanation:
Since -0.75 is a negative number, it would be smaller than a positive number like 0.55. (Tis ain't really a good explanation.)