16
<Example>
Operation
Display
6
4
6
4
Permutations, Combinations
This function finds the number of different possible orderings in selecting
r objects from a set of n objects. For example, there are six different
ways of ordering the letters ABC in groups of three letters—ABC, ACB,
BAC, BCA, CAB, and CBA.
The calculation equation is
3
P
3
= 3 x 2 x
1
= 6 (ways).
This function finds the number of ways of selecting r objects from a set of
n objects. For example, from the three letters ABC, there are three ways
we can extract groups of two different letters—AB, AC, and CB.
The calculation equation is
3
C
2
.
APPLICATIONS:
Used in statistics (probability calculations) and in simulation hypotheses
in fields such as medicine, pharmaceutics, and physics. Also, can be used
to determine the chances of winning in lotteries.
Guide Book̲EL-W531 07.2.5 2:48 PM ページ 16
