HP 12c Solutions Handbook page 121

where m, n are integers and 69 m n 0.
Use the following HP-12C program to calculate the number of possible
permutations.
KEYSTROKES
CLEAR
0
0
n: Unused
PV: Unused
FV: Unused
R -R : Unused
1 .8
1. Key in the program.
2. Key in m and press
3. Key in n and press
4. For a new case go to step 2.
Example: How many ways can 10 people be seated on a bench if only 4
seats are available?
Keystrokes
mPn =
00
REGISTERS
.
to calculate
Display
m!
------------------- -
m n – !
DISPLAY
00-
01- 44
02- 34
03- 43
04- 43 36
05- 45
06- 30
07- 43
08- 10
09-43, 33 00
i: Unused
PMT: Unused
R : n
0
P .
m n
120
0
3
0
3