A shop utilized 10 identical machines. The profit per machine is $40 per hour of operation. Each machine breaks down on the average every 7 hours. One person can repair a machine in 4 hours on the average, but the actual repair time varies according to a Poisson distribution. The repairman's salary is $60/hour. Solve:

Questions:

The number of repairmen that will minimize cost.

The number of repairmen need so that the expected number of broken machines at any given time is less than 4 hours.

Answer rating: 100% (QA)

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