Texas Instruments TI-30X IIS User Manual page 77

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.
A
AB and BA
count as 2
permutations.
Press
4 H
2 <
© 1999 T I
EXAS NSTRUMENTS
4 nPr 2 = x
B C D
AB AC AD
BA BC BD
CA CB CD
DA DB DC
Display
nPr nPr nCr nCr
--- ---
4 nPr 2 4 nPr 2
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TI-30X ÙS: A Guide for Teachers
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70