앫
18
앫
1.047197551
00
840.
θ
0
o
•
0
n
,
0
o
swaps displayed value with value in
memory.
k
Permutation
•
Example:
To determine how many different 4-digit val-
ues can be produced using the numbers 1 through 7
• Numbers cannot be duplicated within the same 4-digit
value (1234 is allowed, but 1123 is not).
7
A
m
4
=
k
Combination
•
Example:
To determine how many different 4-member
groups can be organized in a group of 10 individuals
fx-115WA ................ 10
n
4
=
fx-991WA .......... 10
A
n
4
=
Statistical Calculations
k
Standard Deviation (SD Mode)
• Press
F
F
1
to enter the SD Mode for statistical
calculations using standard deviation.
• Data input always starts with
A
m
=
to clear statisti-
cal memory.
• Input data is used to calculate values for
n
,
Σ
x
,
Σ
x
2
,
o
,
σ
n
and
σ
n
-
1
which you can
recall using the key operations noted
nearby.
210.
0
1
Σ
x
2
0
2
Σ
x
0
k
n
A
M
o
A
A
σ
n
A
N
σ
n
-
1
