Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 10 Counting Methods and Probability - 10.2 Use Combinations and the Binomial Theorem - 10.2 Exercises - Quiz for Lessons 10.1-10.2 - Page 697: 8

Answer

35

Work Step by Step

We know the equation for combinations: $$nC_r = \frac{n!}{r!\left(n-r\right)!}$$ Thus, we find: $$\frac{7!}{4!\left(7-4\right)!}=35$$
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