Chapter 1 – Counting Techniques

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Topic 1.1

General Counting Principle

This lesson is the first of five lessons on the counting techniques needed for a study of probability. The *General Counting Principle*, also known as the **Multiplication Principle**, is the foundation for the lessons in *Binary Counting* and *Permutations – Parts I and II*. It can be done fairly quickly, as students generally don’t appreciate the technique’s power until dealing with *Binomial Probabilities* and *Permutations*. It is however, an important foundational technique that should be referred to in these future topics.

The key is to get students to realize that in a two-step process, the list of possible outcomes forms a two-dimensional grid.

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