The average time a customer can expect to wait in line is:

A single-server waiting line system has an arrival pattern characterized by a Poisson distribution with 3 customers per hour. The average service time is 12 minutes. The service times are distributed according to the negative exponential distribution.

A) 18 minutes.
B) 36 minutes.
C) 30 minutes.
D) 60 minutes.


Answer: A

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