Karin arrives at the post office, which opens at 9:00 a.m., at
9:05 a.m. She finds...
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Basic Math
Karin arrives at the post office, which opens at 9:00 a.m., at9:05 a.m. She finds two cashiers at work, both serving one customereach. The customers started being served at 9:00 and 9:01,respectively. The service times are independent andExp(8)-distributed. Let Tk be the time from 9:05 until service hasbeen completed for k of the two customers, k = 1, 2. Find ETk fork=1 and 2.
The answer is ET1 =4, ET2 =12.
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The solution is given below The source of the confusion mightbe that the parameter for the exponential distribution
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