Texas Instruments TI-34 II Teachers Guide - Page 90
Permutation nPr
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Permutation (nPr) Four different people are running in a race. Use this formula to find how many different ways they can place 1st and 2nd. 4 nPr 2 = x A B AB and BA count as 2 permutations. C D AB AC AD BA BC BD CA CB CD DA DB DC Press 4 H Display -n-P-r nCr ! ¹ 2 < 4 nPr 2 º 12. H © 1999 TEXAS INSTRUMENTS INCORPORATED TI-34 Û: A Guide for Teachers 84
© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI
-
34
Û
: A Guide for Teachers
84
Permutation (nPr)
H
Four different people are running
in a race. Use this formula to find
how many different ways they can
place 1st and 2nd.
4 nPr 2 = x
A
B
C
D
AB and BA
count as 2
permutations.
AB AC AD
BA BC BD
CA CB CD
DA DB DC
Press
Display
4
H
nPr
nCr
!
¹
---
---
2
<
4 nPr
2
º
12.