Answer:
Zero, based on the information provided.
Step-by-step explanation:
The output rate of the teller machine is (1 transaction/6 minutes). Â The input rate is (1 customer/10 minutes). Â This means that the machine completes a cycle faster than the customers arrive, on the average. Â I don't know how an average can be calculated without more information. Â If we assume customers arrive every 10 minutes, and no one screws up the machine, that there should be no waiting line. Â Is there more information about when the customers arrive? Â E.g., 50 arrive in the first hour the machine is open.