Question

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.

Answer 1

Answer:

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.

=