   Chapter 9.8, Problem 16ES ### Discrete Mathematics With Applicat...

5th Edition
EPP + 1 other
ISBN: 9781337694193

#### Solutions

Chapter
Section ### Discrete Mathematics With Applicat...

5th Edition
EPP + 1 other
ISBN: 9781337694193
Textbook Problem
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# An urn contains four balls numbered 2, 2, 5, and 6. If a person selects a set of two balls at random, what is the expected value of the sum of the numbers on the balls?

To determine

To find the expected value of the sum of numbers on the balls.

Explanation

Given information:

An urncontains four balls numbered 2,2,5,and 6 and a person selects a set of two balls at random.

Calculation:

Let B2= ball numbered 2.

B5= ball numbered 5

B6= ball numbered 6

Now when two balls are selected are random the sample space will be ={B2B2,B2B5,B2B6,B5B6}

and all possible sums will be 4,7,8,11

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