   Chapter 9.2, Problem 6TY ### Discrete Mathematics With Applicat...

5th Edition
EPP + 1 other
ISBN: 9781337694193

#### Solutions

Chapter
Section ### Discrete Mathematics With Applicat...

5th Edition
EPP + 1 other
ISBN: 9781337694193
Textbook Problem
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# One formula for the number of r-permutations of a set of n elements is_________ and another formula is_________.

To determine

To fill the blanks in the given statement.

Explanation

Given information:

The given statement is, “One formula for the number of r -permutation of a set of n elements is ______ and another formula is ________”.

If n and r are integers and 1rn, then the number r -permutation of a set of n elements is given by the formula,

P(n,r)=n(n1)(n2)......(nr+1) or n!(nr)!

Therefore, the complete sentence is, “One formula for the number of r -permutation of a set of n elements is n(n1)(n2)

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