Stage 32 · Counting, Permutations, Combinations & the Binomial Theorem

32.2.1 What a Permutation Is

32.2 Permutations: When Order Counts Too

Point 1 of 6

32.2.1 What a Permutation Is

Core idea

Picking a few people and then lining them up in order, where who stands in front and who stands behind makes a different arrangement — ordered selection is called a permutation

Module goal. Understand counting where the selection is ordered, master the permutation formula and factorials, and learn to spot permutation problems that carry restrictions
eastmath.com · 32.2 Permutations: When Order Counts Too · 32.2.1 What a Permutation Is