What is the probability that none of the tires have a flaw

Reference no: EM131009256

1. In a large shipment of automobile tires, 10% have a flaw. Four tires are chosen at random to be installed on a car.

a. What is the probability that none of the tires have a flaw?

b. What is the probability that exactly one of the tires has a flaw?

c. What is the probability that one or more of the tires has a flaw?

2. Of the bolts manufactured for a certain application, 85% meet the length specification and can be used immediately, 10% are too long and can be used after being cut, and 5% are too short and must be scrapped.

a. Find the probability that a randomly selected bolt can be used (either immediately or after being cut).

b. Find the probability that fewer than 9 out of a sam- ple of 10 bolts can be used (either immediately or after being cut).

Reference no: EM131009256

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