# Question: The life X in hours of a certain kind of

The life X, in hours, of a certain kind of radio tube has a probability density function given by

(a) What is the probability that a tube will survive 250 hours of operation?

(b) Find the expected value of the random variable.

(a) What is the probability that a tube will survive 250 hours of operation?

(b) Find the expected value of the random variable.

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