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120
where m, n are integers and 69
≥ m ≥ n ≥ 0.
Use the following HP-12C program to calculate the number of possible
permutations.
1. Key in the program.
2. Key in m and press .
3. Key in n and press to calculate
m
P
n
.
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 DISPLAY
CLEAR
00-
0
01- 44 0
02- 34
03- 43 3
04- 43 36
0
05- 45 0
06- 30
07- 43 3
08- 10
00
09-43, 33 00
REGISTERS
n: Unused i: Unused
PV: Unused PMT: Unused
FV: Unused
R
0
: n
R
1
-R
.8
: Unused
Keystrokes Display
mPn
m!
mn–()!
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=