Permutations and Combinations

What this note covers

1. The Multiplication Principle (Fundamental Counting Principle)
2. Permutations — Ordered Arrangements
3. Circular Permutations and Repeated Objects
4. Combinations — Unordered Selections
5. Pascal's Triangle and Key Identities
6. Applications to Probability
7. Strategy Guide: Choosing the Right Technique

7 sections · 14 key terms & formulas · 6 common mistakes