Question: Problem 3.63 The probability that a disk drive lasts 6000 or more hours equals 0.8. In a batch of 20, 000 disk drives how many

Problem 3.63 The probability that a disk drive lasts 6000 or more hours equals 0.8. In a batch of 20, 000 disk drives how many would be expected to last 6000 or more hours?

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