mergency 911 calls to a small municipality in Idaho come in at the rate of one every 2 minutes. Assume that the number of 911 calls is a random variable that can be described by the Poisson distribution. What is the expected number of 911 calls in 1 hour? What is the probability of three 911 calls in 5 minutes? What is the probability of no 911 calls during a 5-minute period?

College Algebra
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ISBN:9781337282291
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Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Emergency 911 calls to a small municipality in Idaho come in at the rate of one every 2 minutes. Assume that the number of 911 calls is a random variable that can be described by the Poisson distribution.

  1. What is the expected number of 911 calls in 1 hour?

  2. What is the probability of three 911 calls in 5 minutes?

  3. What is the probability of no 911 calls during a 5-minute period?

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