## Elementary Statistics (12th Edition)

Published by Pearson

# Chapter 5 - Discrete Probability Distributions - 5-3 Binomial Probability Distributions - Basic Skills and Concepts: 1

#### Answer

This is only 1 out of the ${5 \choose 2}$ possiblities.

#### Work Step by Step

We want to know the probability of exactly two adults including Wal-Mart. In the construction, we are given that the first two adults include Wal-Mart, and the other 3 don't. However, this is only 1 out of the ${5 \choose 2}$ possiblities, and we have to count those too.

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