Question: what is the correct answer with reason and why other options are incorrect? QUESTION: n espresso stand has a single server. Customers arrive to the

what is the correct answer with reason and why other options are incorrect?

QUESTION: n espresso stand has a single server. Customers arrive to the stand at an average rate of 28

per hour. The average service rate is 35 customers per hour. The average time in minutes a

customer spends waiting in line for service is:

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