Math Probability Question

1. May 10, 2005

seiferseph

Here is the problem, i'm having trouble getting started. Do i need a tree diagram? what kind? how do i use it to solve? Thanks in advance!

http://i2.photobucket.com/albums/y15/seiferseph/2.jpg

2. May 10, 2005

Jameson

What is probability?

$$\frac{desired outcome}{allpossibleoutcomes}$$

If you don't like to keep the percentages, use and easy number to reference, like 100 people. Remember that the test is skewed. If the test is 95% accurate, how well that affect the testing?

3. May 10, 2005

seiferseph

just got it, thanks.