A vending machine dispenses hot chocolate or coffee. Service duration is 30 seconds per cup and is

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A vending machine dispenses hot chocolate or coffee. Service duration is 30 seconds per cup and is constant. Customers arrive at a mean rate of 80 per hour (assume Poisson). Also assume that each customer buys only one cup. Determine:
a. The average number of customers waiting in line.
b. The average time customers spend in the system.
c. The average number of customers in the system.
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Operations Management

ISBN: 978-0071091428

4th Canadian edition

Authors: William J Stevenson, Mehran Hojati

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