7. Among all the computer chips produced by a certain factory, 6 percent are defective. A sample of 400 chips is selected for inspection. a. What is the probability that this sample contains between 20 and 25 defective chips (including 20 and 25)? b. Suppose that each of 40 inspectors collects a sample of 400 chips. What is the probability that at least 8 inspectors will find between 20 and 25 defective chips in their samples?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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7. Among all the computer chips produced by a certain factory, 6 percent are defective.
A sample of 400 chips is selected for inspection.
a. What is the probability that this sample contains between 20 and 25 defective
chips (including 20 and 25)?
b.
Suppose that each of 40 inspectors collects a sample of 400 chips. What is the
probability that at least 8 inspectors will find between 20 and 25 defective chips
in their samples?
Transcribed Image Text:7. Among all the computer chips produced by a certain factory, 6 percent are defective. A sample of 400 chips is selected for inspection. a. What is the probability that this sample contains between 20 and 25 defective chips (including 20 and 25)? b. Suppose that each of 40 inspectors collects a sample of 400 chips. What is the probability that at least 8 inspectors will find between 20 and 25 defective chips in their samples?
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