7: Combinatorics Last updated Oct 6, 2021 Save as PDF 6.4: Sum of a Series 7.1: The Fundamental Principle of Counting Page ID40932 Richard W. BeveridgeClatsop Community College ( \newcommand{\kernel}{\mathrm{null}\,}\) 7.1: The Fundamental Principle of Counting7.2: Factorial Notation and Permutations7.3: Permutations and Combinations7.4: General Combinatorics Problems7.5: Distinguishable Permutations7.6: Probability