survey of cars on a certain stretch of highway during morning commute showed that 70% had only 1 occupant, 15% had 2, 10% had 3, 3% had 4 and 2% had 5. Let X be the number of occupants in a randomly chosen car. a. Find the PMF of X b. Find P(X 3) Find the mean and std Deviation

survey of cars on a certain stretch of highway during morning commute showed that 70% had only 1 occupant, 15% had 2, 10% had 3, 3% had 4 and 2% had 5. Let X be the number of occupants in a randomly chosen car. a. Find the PMF of X b. Find P(X 3) Find the mean and std Deviation

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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Question

a survey of cars on a certain stretch of highway during morning commute showed that 70% had only 1 occupant, 15% had 2, 10% had 3, 3% had 4 and 2% had 5. Let X be the number of occupants in a randomly chosen car.

a. Find the PMF of X
b. Find P(X </=2)
c. Find P(X>3)

Find the mean and std Deviation

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