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100 ways to get students hooked on math!

It happens to the best of us: that one question that's got you stumped. Or maybe you have the answer, but it's not all that compelling or convincing. Al Posamentier and his coauthors to the rescue with this handy reference containing fun answers to students' 100 most frequently asked math questions. Even if you already have the answers, Al's explanations are certain to keep kids hooked·and that's what it's all about.

The questions are all organized around the Common Core's math content standards and relate directly to Numbers and Quantity, Functions, Algebra, Geometry, and Statistics and Probability. The big benefits? You'll discover high-interest ways to:

Teach inquiry and process in mathematical thinking; Encourage flexibility in problem solving; Emphasize efficient test-taking strategies; Provide practical applications from mathematics, education, and human development research; Build students' procedural skills and conceptual understanding.

Use this complete resource to save time, anticipate questions, promote process and thinking, and present yourself as the math expert we know you are.

### Chapter 5: Probability Questions

##### Probability Questions
Probability questions
##### 90. What is the Fundamental Principle of Counting?

Suppose an event, E1, can occur in n1 different ways, a second event, E2, can occur in n2 different ways, and so on, and a kth event, Ek, can occur in nk different ways. Then the fundamental principle of counting states that the number of different ways for these k events to occur in succession is given by n1 × n2 × … ...