Question: 6.55 According to a telephone operator, the average time for each call is 3.2 minutes. This time follows an exponential distribution. (a) What is the

6.55 According to a telephone operator, the average time for each call is 3.2 minutes. This time follows an exponential distribution.

(a) What is the probability that the call time exceeds 5 minutes?

(b) What is the probability that call completes in 2 minutes?

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