Question: A small credit union has a small branch with two tellers. The arrival rate of customers to the branch is 12 customers per hour and

A small credit union has a small branch with two tellers. The arrival rate of customers to the branch is 12 customers per hour and the average service time is 8 minutes.

Both inter-arrival time and service time follow exponential distributions.

a. What is the utilization rate?

b. What is the average waiting time in line?

c. What is the average number of customers in system (waiting and in

service)?

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