The number of telephone calls that arrive at a phone exchange is often modeled as a Poisson random variable. Assume that on the average there are 10 calls per hour. a. What is the probability that there are exactly 5 calls in one hour? b. What is the probability that there are exactly 5 calls in 30 minutes? c. What is the probability that there are at least 3 calls in one hour?

The number of telephone calls that arrive at a phone exchange is often modeled as a Poisson random variable. Assume that on the average there are 10 calls per hour. a. What is the probability that there are exactly 5 calls in one hour? b. What is the probability that there are exactly 5 calls in 30 minutes? c. What is the probability that there are at least 3 calls in one hour?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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