Section 9.2: Probability Models
Homework Hints

Problems 1-2
There are many problems throughout the text labeled IN YOUR OWN WORDS. Just relax. Do not be afraid to give your opinion. For the most part, these questions do not have "right" or "wrong" answers. You should spend about five minutes in answering each of these questions.

Problems 3-8
These are estimation problems so they should not be worked with a paper and pencil or with a calculator. What you should do here is decide which of the given events are more probable.

Problems 9-14
See Example 1. Problems 13-14 See Example 2.

Problems 15-20
These problems are designed to get you thinking about the complement of a given event.

Problems 21-23
List all possibilities as shown in Examples 2 and 3 or use the Fundamental Counting Principle as shown in Example 4."

Problems 24-27
See Example 5.

Problems 28-32
See Example 2.

Problems 33-43
Problems 33-43
These applied problems require either the Fundamental Counting Principle or the Property of Complements.

Note: Homework Hints are given only for the levels 1 and 2 problems. You can also check some sources for homework help on the Internet (see Links, below), or you can call the author at
(707) 829-0606 or send an e-mail to: smithkjs@mathnature.com