Combinatorics · Lesson
Before using special formulas, count independent choices one after another: each branch of the tree multiplies by the following branches.
Prerequisites: Multiplication of natural numbers
Goal: Build and count all outcomes of successive choices using tree diagrams and the fundamental counting principle.
Change the data, observe how the number of cases changes, and use the lab to understand the counting structure you are using.
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Count the branches at each level. Every first-level choice can be paired with all choices at later levels.
Data / situation: You have 4 shirts, 3 pairs of trousers and 2 pairs of shoes.
ConceptStep separates what is required from what is recommended or useful as reinforcement. Only required prerequisites block your progress.