This site is designed solely for the use of Mr. Habib's MAT 120 classes.  All rights reserved.  No part of this site or its contents from MAT textbook (STATISTICS Informed Decisions Using Data by: Michael Sullivan, III) may be reproduced by any process without written permission by the author or publisher and/or Mr. Habib.

Computing Permutations

Example:  Evaluate:   

In this example, there are 7 objects (n=7). From these 7 objects are selected (r=5). The permutation formula counts the number of different ways that these 5 objects can be selected and arranged from the total of 7 objects. The formula nPr is used with n=7 and r=5. So, the formula is 7P5.

Press, MATH, highlight PRB and select 2:nPr and ENTER.

Now press, and ENTER. The answer, 2520, appears on the screen.