The average number of orders called into a Noodles & Company restaurant over the lunch period is

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The average number of orders called into a Noodles & Company restaurant over the lunch period is 2.3 orders per minute.

(a) What assumption is necessary to use the Poisson model to describe customer orders?

(b) What is the probability that there will be exactly 3 orders called in one minute?

(c) What is the probability that there will be at least 3 orders called in one minute?

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