Customers arrive at a rate of 40 per hour. You can process 50 customers per hour. a. What percentage of the time are you busy? b. What is the average number of customers in the system? c. What is the average time that a customer spends in the system (in minutes)?

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Q: what percentage of the men worked?

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Q: 7. What percentage suffered for fewer than 61 hours?

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A: total for boys=162 total for girls=146