College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 8 - Sequences, Induction, and Probability - Exercise Set 8.6 - Page 770: 65

Answer

$15_{{P}{_{3}}}$ = 2730

Work Step by Step

Total number of flavors of ice cream = 15 Number of flavors used to create cones, with the position of them on top, middle ,and bottom is important = 3 To find the number of cones to create with three flavors of ice cream with the position of them on top, middle ,and bottom, we use the formula $n_{{P}{_{r}}}$ = $\frac{n!}{(n - r)! }$ The number cones to create with three flavors of ice cream with the position of them on top, middle ,and bottom = $15_{{P}{_{3}}}$ = $\frac{15!}{(15 - 3)!}$ = $\frac{15!}{12!}$ = $\frac{15\times14\times13\times12!}{12!}$ = $15\times14\times13$ = 2730
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