Question: The time between calls to a corporate office is exponentially distributed with a mean of 10 minutes. (a) What is the probability that there are

The time between calls to a corporate office is exponentially distributed with a mean of 10 minutes.
(a) What is the probability that there are more than three calls in one-half hour?
(b) What is the probability that there are no calls within one-half hour?
(c) Determine x such that the probability that there are no calls within x hours is 0.01.

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