The number of people arriving for treatment at an emergency

The number of people arriving for treatment at an emergency room can be modeled by a Poisson process with a rate parameter of five per hour.

(a) What is the probability that exactly two arrivals occur during a particular hour? (Round your answer to three decimal places.)

(b) What is the probability that at least two people arrive during a particular hour? (Round your answer to three decimal places.)

people

You may need to use the appropriate table in the Appendix of Tables to answer this question.

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