The number of telephone calls that arrive at a phone exchange is often modelled as a Poisson random variable. Assume that on the average there are 10 calls per hour. 1) What is the probability that there are exactly 5 calls in one hour? 2) What is the probability that there are 3 or less calls in one hour? 3) What is the probability that there are exactly 15 calls in two hours? 4) What is the probability that there are exactly 5 calls in 30 minutes?

The number of telephone calls that arrive at a phone exchange is often modelled as a Poisson random variable. Assume that on the average there are 10 calls per hour. 1) What is the probability that there are exactly 5 calls in one hour? 2) What is the probability that there are 3 or less calls in one hour? 3) What is the probability that there are exactly 15 calls in two hours? 4) What is the probability that there are exactly 5 calls in 30 minutes?

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter10: Sequences, Series, And Probability

Section10.8: Probability

Problem 32E

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