Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 12 - Data Analysis and Probability - 12-6 Permutations and Combinations - Practice and Problem-Solving Exercises - Page 756: 64


Always true

Work Step by Step

$nC(n-1) = n$ $n!/(n-(n-1))!(n-1)! = n$ $n!/(n-n+1)!(n-1)! = n$ $n!/1!(n-1)! = n$ $n*(n-1)!/(n-1)! = n$ $n=n$
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