From past experience, a professor knows that the test score of a student taking her final examination is a random variable with a mean of 75. Use the central limit theorem to solve the following. How many students would have to take the examination to ensure, with a probability of at least 0.9, that the class average would be within 5 of 75

b is the final answer! : )

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45

false

step-by-step explanation: