Stage 32 · Counting, Permutations, Combinations & the Binomial Theorem
32.1.5 Tree Diagrams and Listing
32.1 The Two Counting Principles: Where All Counting Begins
Point 5 of 6
32.1.5 Tree Diagrams and Listing
Core ideaDraw every choice as a branching tree, count the leaves, then look back and check that your addition and multiplication gave the same answer
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