Question: Customer interarrival times at a store are exponentially distributed with rate 8 customers per hour. Customers are served by a single customer service representative (CSR),

Customer interarrival times at a store are

Customer interarrival times at a store are exponentially distributed with rate 8 customers per hour. Customers are served by a single customer service representative (CSR), with an average service time of 5 minutes. Service times are also exponentially distributed. Which of the following statements are true? All answers are correct. The probability of having exactly one customer in the store is 0.222. The average wait time for the CSR is 10 minutes. On average there are 2 customers in the store. The store is busy with at least one customer 66.7% of the time

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