Chips ahoy for the computer chips described in exercise 10, Ask an Expert

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Chips ahoy

For the computer chips described in Exercise 10, how many do you expect to test before finding a bad one?

Exercise :
Chips. Suppose a computer chip manufacturer rejects 2% of the chips produced because they fail presale testing.

a) What's the probability that the fifth chip you test is the first bad one you find?

b) What's the probability you find a bad one within the first 10 you examine?

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