Question: 1 Staffing at the Optimal Utilization A large grocery store is attempting to staff its check-out registers. Currently, the arrival rate is = 320 customers

1 Staffing at the Optimal Utilization A large

1 Staffing at the Optimal Utilization A large grocery store is attempting to staff its check-out registers. Currently, the arrival rate is = 320 customers per hour, each server has a service time of E(T) = 3.75 minutes on average, and the interarrival and service times follow an exponential distribution. Considering any one of the individual s* queues, derive the expected expected number of customers in the system (waiting plus service). a. 1.5 customers b. 4 customers C. 9 customers d. 3 customers

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