Question: ZBank is currently having teller counters to serve the need of the customers. The customers arrive at the rate of 20 customers per hour. The

ZBank is currently having teller counters to serve the need of the customers. The customers arrive at the rate of 20 customers per hour. The Teller takes in an average 2 minutes per customer.

  1. What type of queuing stem they have currently
  2. How many of customers wait in line and what is the average wait time
  3. If the bank replaces the teller by a ATM machine which takes exactly 2 minutes every time to serve a customer What type queuing system the bank will have
  4. How many customers will wait at ATM and what is the average wait time

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