Basics of Math Olympiad: Problem Solving Guide for High School Students. Volume 3: Combinatorics (ISBN: 978-983-44678-2-1)

Chapter 1: Clever Counting

Chapter 2: Counting Principles

Chapter 3: Permutations o Chapter 4: Combinations

Chapter 5: Binomial Coefficients

Chapter 6: Binomial Theorem

Chapter 7: Fibonacci Numbers

Chapter 8: Bijective Proof

Chapter 9: Pigeonhole Principle I

Chapter 10: Pigeonhole Principle II