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Solution:
The permutations of 6 things (n) taken 6 at a time (k) is
solved using the formula:
p" _
n!
_
_6!
k
(n-k)!
(6-6)!
)
.
N
600
!
Press: 6 - 6|t @
6400
'
o
720000
Almost two years!
Percentage Problems
To find the percentage of a number, enter the base number and press
ENTER?®. Then key in the percent rate and press
.
A. Find 25% of 78
Press: (ciea)
CLEAR
7800
+
N
"
25400
%
78| 11|
251 %
|}
£
C:]
T
19.50
o
A listing of the stack shows that the base number and the percentage
are in Y and X.
000
SO
.
-
LIST
Press:
.
0.00
cté
78.00
-S9O
19650
«So
STK
19
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