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Suppose that when a transistor of a certain type is subjected to an accelerated life test,...

Suppose that when a transistor of a certain type is subjected to an accelerated life test, the lifetime X (in weeks) has a gamma distribution with mean 40 and variance 320.

a) What is the probability that a transistor will last between 1 and 40 weeks?

b) What is the probability that a transistor will last at most 40 weeks?

Math   Statistics-And-Probability   
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