Question: A bank employs three tellers. A teller requires, on average, 10 minutes to process a customer's transaction and customers arrive at the bank at the

A bank employs three tellers. A teller requires, on average, 10 minutes to process a customer's transaction and customers arrive at the bank at the rate of 15 per hour. Service time follows an exponential distribution and arrival rate follows a Poisson distribution.

What is the probability that at least five customers are in the bank? Round your answer to three decimals.

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