Stage 32 · Counting, Permutations, Combinations & the Binomial Theorem
32.1.3 The Multiplication Principle (Counting by Steps)
32.1 The Two Counting Principles: Where All Counting Begins
Point 3 of 6
32.1.3 The Multiplication Principle (Counting by Steps)
Core ideaPairing a shirt with pants takes two steps, and you only have an outfit once both are picked, so the count is the steps multiplied, N = m1 x m2 x ...
Module goal. Build the two basic habits of mind — add when you sort into kinds, multiply when you go step by step — and learn to tell whether a task is a 'sort' or a 'sequence', laying the foundation for permutations and combinations