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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
13 Nov 2021

Given information

Suppose that the length of long-distance phone calls, measured in minutes, is known to have an exponential distribution with the average length of a call equal to eight minutes.

Step-by-step explanation

Step 1.

As given in the problem the average length of call is minutes and then if calls are made so the total call duration will be

.

The reason being the total duration will be each call's duration added to the number of times the calls are made.

  

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