   Chapter 14.4, Problem 21E ### Algebra and Trigonometry (MindTap ...

4th Edition
James Stewart + 2 others
ISBN: 9781305071742

#### Solutions

Chapter
Section ### Algebra and Trigonometry (MindTap ...

4th Edition
James Stewart + 2 others
ISBN: 9781305071742
Textbook Problem

# APPLICATIONExpected Number During the school year a college student watches TV for two hours a week with probability 0.15 , three hours with probability 0.45 , four hours with probability 0.30 , and five hours with probability 0.10 . Find the expected number of hours of TV that he watches per week.

To determine

The expected number of hours of TV that he watches per week.

Explanation

Given:

A college student watches TV for two hours a week with probability 0.15, three hours with probability 0.45, four hours with probability 0.30, and five hours with probability 0.10.

Approach:

The expected value is given as,

E=a1p1+a2p2++anpn ...(1)

Here, a1,a2,,an is the number of hours and p1,p2,,pn is the probability.

Calculation:

Calculate the expected number of hours.

Substitute 0.15 for p1, 0.45 for p2, 0.30 for p3, 0

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