In "Calculated Risk," Charlie attempts to reduce a cumbersome set of variables to a common point by "pruning" an enormous tree diagram. This requires very complex advanced algorithms, but the basic concept can be appreciated through the understanding of dependent events and conditional probability.
Before the Activity
Download the attached PDF and look over the Teacher page.
During the Activity
Discuss the materials from the Student Page with your class.
After the Activity
Encourage students to explore web sites and questions from the Extensions page.