# Catalog Age lists the top 17 U.S. firms in annual catalog sales. Dell Computer is number one

## Question:

Catalog Age lists the top 17 U.S. firms in annual catalog sales. Dell Computer is number one followed by IBM and W.W. Grainger. Of the 17 firms on the list, 8 are in some type of computer-related business. Suppose four firms are randomly selected.

a. What is the probability that none of the firms is in some type of computer-related business?

b. What is the probability that all four firms are in some type of computer-related business?

c. What is the probability that exactly two are in non-computer-related business?

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**Related Book For**

## Business Statistics for Contemporary Decision Making

**ISBN:** 978-0470910184

6th Edition

**Authors:** Ken Black