7: Combinatorics Last updated Aug 14, 2019 Save as PDF 6.3: Equivalence Relations and Partitions 7.1: Intro, Probability and Pigeonhole Principle Page ID23253 Harris KwongState University of New York at Fredonia via OpenSUNY ( \newcommand{\kernel}{\mathrm{null}\,}\) 7.1: Intro, Probability and Pigeonhole Principle7.2: Addition and Multiplication Principles7.3: Permutations7.4: Combinations7.5: Combinations WITH Repetitions7.6: The Binomial Theorem