Back at Tinker Air Force Base, an aircraft seam requires 25 rivets during an MRO operation. The seam will have to be reworked if any of these rivets is defective. Suppose rivets are defective independently of one another, each with the same probability. a. If 20% of all seams need reworking, what is the probability that a rivet is defective? b. How small should the probability of a defective rivet be to ensure that only 10% of all seams need reworking?
Back at Tinker Air Force Base, an aircraft seam requires 25 rivets during an MRO operation. The seam will have to be reworked if any of these rivets is defective. Suppose rivets are defective independently of one another, each with the same probability. a. If 20% of all seams need reworking, what is the probability that a rivet is defective? b. How small should the probability of a defective rivet be to ensure that only 10% of all seams need reworking?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
Back at Tinker Air Force Base, an aircraft seam requires 25 rivets during an MRO operation. The
seam will have to be reworked if any of these rivets is defective. Suppose rivets are defective
independently of one another, each with the same probability.
a. If 20% of all seams need reworking, what is the probability that a rivet is defective?
b. How small should the probability of a defective rivet be to ensure that only 10% of all
seams need reworking?
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