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

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 cach server has a service time of E(T) - 3.75 minutes on average, and the interarrival and service times follow an exponential distribution. What is the marginal probability that a customer's service time will be greater than three mimtes (0.05 hours), that is P(T > 0.05)? O a. 0.37 Ob 0.83 OC 0.45 Od 0.64 Calculate the bounded (joint) probability that a customer's service time will be between three minutes (0.05 hours) and nine minutes (0.15 hours), that is P(0.05

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