Algebra 1

Published by Prentice Hall

Chapter 12 - Data Analysis and Probability - Chapter Review - 12-6 Permutations and Combinations - Page 777: 23

6

Work Step by Step

Use the formula of permutation: $_{n}$P$_{r}$=$\frac{n!}{(n-r)!}$. Plug in 3 for N and 2 for R: $_{n}$P$_{r}$=$\frac{n!}{(n-r)!}$ $_{3}$P$_{2}$=$\frac{3!}{(3-2)!}$ -simplify- $_{3}$P$_{2}$=$\frac{3!}{1!}$ -write using factorial- $_{3}$P$_{2}$=$\frac{3*2*1}{1}$ -simplify- $_{3}$P$_{2}$=6

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