Question: Customers walk into a facility with one single server and depart after receiving service at an average rate of 12 customers per hour. The average

Customers walk into a facility with one single server and depart after receiving service at an average rate of 12 customers per hour. The average activity time is 4 minutes. Both the arrival and service processes are random. On average there are 3 customers waiting in queue to be served. On average how long does a customer wait in queue? (Choose the option that is closest to the correct answer.)

Group of answer choices

5 minutes

8 minutes

10 minutes

12 minutes

15 minutes

18 minutes

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