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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