### Home > CCG > Chapter 6 > Lesson 6.1.3 > Problem 6-28

6-28.

There are

If a random geometry student is chosen, what is the chance (in percent) the student is a freshman or sophomore? Show how you can use the Addition Rule to answer this question. What was unusual about using the Addition Rule to answer this question?

Addition Rule:

The unusual part is that the probability ofand(the overlap) was. of the geometry students perform in band and perform in chorus. There is a chance that a geometry student performs in either band or chorus. What is the probability a geometry student performs both in band and in chorus? Use the Addition Rule again but this time you will need to solve the equation.