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A bank manager estimates that an average of four customers enter the tellers' queue every six minutes. Assume that the number of customers that enter

A bank manager estimates that an average of four customers enter the tellers' queue every six minutes. Assume that the number of customers that enter the tellers' queue is Poisson distributed. What is the probability that exactly five customers enter the queue in a randomly selected six-minute period?

a. 0.061

b. 0.1563

c. 0.1999

d. 0.2466

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