Question: The average time between customer arrivals at a store is 7 minutes which is exponentially distributed. Customers are served by a single customer service representative

The average time between customer arrivals at a store is 7 minutes which is exponentially distributed. Customers are served by a single customer service representative at a rate of 10 customers per hour with service times also exponentially distributed. In steady state, None of the other answers are correct. The average number of customers waiting in line in the store is 5.14. The store is busy with customers 85.7% of the time. There is a 9% chance of having exactly three customers in the store. All answers (except "None") are correct. The average wait time is 36 minutes. Customer interarrival times at a store are exponentially distributed with rate 8 per hour. Customers are served by a single customer service representative, with an average time of 5 minutes that is also exponentially distributed. In steady state, The probability of having exactly one customer in the store is 0.222. The average wait time is 10 minutes. All answers (except "None") are correct. The average number of customers in the store is two, None of the other answers are correct. The store is busy 66.7% of the time

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