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Suppose that defective items on a production line occur according to a Poisson distribution, at an...

Suppose that defective items on a production line occur according to a Poisson distribution, at an average rate of 3 defective items per hour. Let X count the number of defective items produced over a one-hour period. What is the probability that more than 4 defective items will be produced during the one-hour period?

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