Question: 5.3. Let X be an exponentially distributed random variable with parameter A. Determine the mean of X (a) by integrating by parts in the definition

5.3. Let X be an exponentially distributed random variable with parameter A. Determine the mean of X

(a) by integrating by parts in the definition in equation (2.7) with m =1

(b) by integrating the upper tail probabilities in accordance with equation

(5.3).

Which method do you find easier?

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