There are six telephone lines in a company. Let X denote the number of lines in use at aspecified time. The probability mass function of X is as given as follow:01234.10.15 .20.25p(x)What is the probability of less than three lines are in use?Ⓡa. 0.21b. None of the answersC. 0.47d. 0.45.205.066.04

Answered: There are six telephone lines in a…

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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There are six telephone lines in a company. Let X denote the number of lines in use a specified time. The probability mass function of X is as given as follow: 0 12 3 4 .10 .25 X p(x) .15 .20 .20 5 .06 .0