Lesson Plan: Odd or Even? The Addition and Complement Principles of Probability
Wendy Weber, Carrie Even, and Susannah Weaver
(Grades 9-12+) Originally published November 2015, this lesson engages students in an exploration activity and a class discussion. After completing this lesson, students will be able to determine when events are mutually exclusive, and then use the Addition Principle to calculate the probability of mutually exclusive and non-mutually exclusive events. Furthermore, the students will explore the probabilities of complementary events and develop the Complement Principle.
