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27 May, 16:05

A cafeteria serving line has a coffee urn from which customers serve themselves. arrivals at the urn follow a poisson distribution at the rate of 4.0 per minute. in serving themselves, customers take about 11 seconds, exponentially distributed.

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  1. 27 May, 16:40
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    The answer is 3 customer's per minute.

    Explanation:

    Arrival date = 3 per minute

    Service rate = 11 seconds. = 5.45 seconds.

    Average number in system = 3 : (5.45-3)

    = 1.3 customers per minute.

    =
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