(Solved): 1. Repair calls are handled by one repairman at a photocopy shop, Repair time, including travel tim ...

1. Repair calls are handled by one repairman at a photocopy shop, Repair time, including travel time, is exponentially distributed, with a mean of two hours per call. Requests for copier repairs come in at a mean rate of three per eight-hour day (assume Poisson). Determine: a. The average number of customers awaiting repairs. b. System utilization. c. The amount of time during an eight-hour day that the repairman is not out on a call. d. The probability of two or more customers in the system.