Customers arrive at a bank at a rate of 50 per hour. The bank has 3 tellers and on average, it takes 2 minutes to service a customer
(a) What proportion of time are the tellers busy?
(b) What is the average number of customers in the bank?
(c) What is the average weight time?
(a) ? = 0.55
(b) L = 2.04
(c) Wq = 0.0075 hour
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