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Counting and Probability

Slide 7-2. Factorials. If we want to rearrange 7 people, we can use the multiplication principle: 7 x 6 x 5 x 4 x 3 x 2 x 1 = 5,040On your calculator, there is a shorter way to do this, using the Factorial (n!) button n! = n x (n-1) x (n-2) x . . . x 3 x 2 x 1 5! = 1206! = 7200! = 1. Slide 7-

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Counting and Probability

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