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A call center wants to determine how many customer representatives to hire. An average of 80...

A call center wants to determine how many customer representatives to hire. An average of 80 calls per hour is estimated to have. Interarrival times are exponentially distributed. Each customer representative’s service time is assumed to be exponentially distributed with mean 1.5 minutes and her service time costs $6 per hour. Waiting of a customer on line is estimated to cost $24 per hour. Determine the optimum number of representatives to hire.

Math   Statistics-And-Probability   
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