QUESTION 4The number of telephone calls that arrive at a phone exchangeis often modelled as a Poissonrandom variable. Assume that on the average there are 6 callsper hour.(a) Calculate the probability that there are 2 or less calls inone hour.ANSWER: 0.06197(b) Calculate the probability that there are exactly 9 calls intwo hours.ANSWER: 0.08736(c) Calculate the probability that there are at least 3 calls intwo hours.ANSWER: 0.99948

It is given that the number of telephone calls that arrive at a phone exchange is often modelled as…

Answered: (a) Calculate the probability that…

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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(a) Calculate the probability that there are 2 or less calls in one hour. ANSWER: 0.06197 (b) Calculate the probability that there are exactly 9 calls in two hours. ANSWER: 0.08736 (c) Calculate the probability that there are at least 3 calls in two hours.