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Bizhelp, CPA
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Experience:  BA degree and Certified Public Accountant
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Repair calls are handled by one repairman at this photocopy

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Repair calls are handled by one repairman at this photocopy shop. Repair time, including travel time, is exponentially distributed, with a mean of two hours per call. Requests for copier repairs arrive at a rate of three per 8-hour day (assume poisson).
What is the average number of customers waiting repairs?

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