On average, 1 in 800 computer crashes during a severe thunderstorm. A certain company had 4,000 working computers when the perspective area was hit by a severe thunderstorm. 1)Compute the expected value and variance of the number of crashed computers. 2)Find the probability that less than 10 computers have crashed

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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On average, 1 in 800 computer crashes during a severe thunderstorm. A
certain company had 4,000 working computers when the perspective area was hit by a severe thunderstorm.

1)Compute the expected value and variance of the number of crashed
computers.

2)Find the probability that less than 10 computers have crashed

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