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Question:

4. Customers arrive to a single-server queue according to a Poisson process with mean rate 4 per

hour. Customer service times have a normal distribution with mean of 10 minutes and standard deviation of 2 minutes.


Find:

a. average number of customers in queue

b. average time customers spend in queue


Answer:

4. (a) .6933 (b) .1733 hour


Professor gave answer, but I would like to see the steps on how to solve it.

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