Discussion:
1) Western national bank is considering a drive through window for customer service.Management estimates that customers will arrive at the rate of 15 per hour. The teller who will staff the window can service customers at the rate of of one every 3 minutes.Assuming Poisson arrivals and exponential service ,find
a) utilization of the teller,
b) average number in waiting line,
c) average number in the system,
d) average waiting time in the line,and
e) average waiting time in the system,including service.