How long does a customer have to wait on average

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Assignment:

In order to pay his rent, Tom, a college student, has taken a job in the computer department of a local department store. His only responsibility is to answer telephone calls to the department, most of which are inquiries about store hours and product availability. As Tom is the only person answering calls, the manager of the store is concerned about queuing (or waiting line) problems.

Currently, the computer department receives an average of one call every 4 minutes.

Tom requires an average of 3 minutes to handle a call. You can assume exponential inter-arrival times and processing times.

Assume that there is no limit on the number of customers that can be on hold, and customers do not hang up even if they are forced to wait a long time. The telephone company charges $5.00 per hour for telephone lines whenever they are in use (either while the customer is in conversation with Tom or on hold because Tom is talking to another customer).

How long does a customer have to wait on average, before talking to Tom?

Reference no: EM133232352

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