# Homework Hints 13-5

### Note: Homework Hints are given only for the Level 1 and Level 2 problems.

However, as you go through the book be sure you look at all the examples in the text. If you need hints for the Level 3 problems, check some sources for help on the internet (see the LINKS for that particular section. As a last resort, you can call the author at (707) 829-0606.

On the other hand, the problems designated “Problem Solving” generally require techniques that do not have textbook examples.

There are many sources for homework help on the internet.

Algebra.help
Here is a site where technology meets mathematics. You can search a particular topic or choose lessons, calculators, worksheets for extra practice or other resources.
http://www.algebrahelp.com/

Dr. Math is a registered trademark. This is an excellent site at which you can search to see if your question has been previously asked, or you can send your question directly to Dr. Math to receive an answer.
http://mathforum.org/dr.math/

Quick Math
This site provides online graphing calculators. This is especially useful if you do not have your own calculator.
http://www.quickmath.com/

The Math Forum @ Drexel
This site provides an internet mathematics library that can help if you need extra help. For additional homework help at this site, click one of the links in the right-hand column.
http://mathforum.org/

Problems 1-6
Use the tree diagram to find each requested probability. See Example 1.
Problem 7-12
Use a tree diagram and Bayes’ theorem. See Example 4.
Problem 13-24
Use the Venn diagram and look for the given set. See Example 2.
Problem 25-30
Consider these problems a sequence of exercises leading to a correct calculation of P(A)2.
Problem 31-36
Consider these problems a sequence of exercises leading to a correct calculation of  P(D2).
Problem 37-42
Construct a tree diagram and then use it to calculate each of the requested probabilities.
Problem 43-46
Construct a tree diagram and then use it to calculate each of the requested probabilities.