1i,j. first pic helps solve questions in second pic

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. For any one of the individual s queues, what is the expected waiting time (minutes) spent in line for a customer? a. 10 minutes b. 4 minutes c. 38 minutes d. 15 minutes Clear my choice 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. 9 customers c. 3 customers d. 4 customers Clear my choice 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. For any one of the individual s queues, what is the expected waiting time (minutes) spent in line for a customer? a. 10 minutes b. 4 minutes c. 38 minutes d. 15 minutes Clear my choice 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. 9 customers c. 3 customers d. 4 customers Clear my choice