An express checkout line at a grocery store takes an average of 3 minutes to ring-up a

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An express checkout line at a grocery store takes an average of 3 minutes to ring-up a customer’s order. On average 4 customers are in the checkout line. What is the average number of customers per hour that are processed in the checkout line?
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OM operations management

ISBN: 978-1285451374

5th edition

Authors: David Alan Collier, James R. Evans

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