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8. A high school operates 450 computers. On a given day, an average of 15 of...

8. A high school operates 450 computers. On a given day, an average of 15 of these computers are out of service. A computer lab contains 30 computers. A teacher would like to use the lab with her class of 27 students.  

a) Determine the mean and standard deviation of the normal approximation

b) Use the normal approximation to determine the approximation to determine the probability that i) there will be enough working computers

ii) at most 24 computers working?

Math   Statistics-And-Probability   
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Answer #1

P(computer working) = p = 435/450

= 0.9667

A.

B.

P(there will be enough working computers) = P(X=27)

=

C.

Please upvote if you have liked my answer, would be of great help. Thank you.

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