Topic: Probability Rules and Counting

Factorials and Counting Notation

Experiments, Outcomes, and Sample Spaces

Events as Subsets of a Sample Space

Dice Sums by Enumeration and Symmetry

Deriving the Permutation Formula

Deriving the Combination Formula by Removing Order

Deriving the Addition Rule by Counting Overlap

Complements and the Probability of at Least One

Complementary Counting for Restricted Selections

Common Errors in Counting and Probability