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The random functions (random) will generate different
Note:
numbers every time when the display is redrawn.
Therefore, the table values of the random functions will
be different every time. When in case of random-based
graphing calculations, the tracing values and other
parameters of the graph will not match the graph's
visual representation.
2 nPr
Returns the total number of different arrangements
(permutations) for selecting "r" items out of "n" items.
P
=
n
r
(n
Example
• How many different ways can 4 people out of 6 be
seated in a car with four seats?
6 M C 2 4 E
Returns the total number of combinations for selecting
3 nCr
"r" item out of "n" items.
C
=
n
r
r!(n
Example
• How many different groups
of 7 students can be
formed with 15 students?
1 5 M C 3 7
E
Returns a factorial.
4 !
Example
• Calculate 6 × 5 × 4 × 3 × 2 × 1.
6 M C 4 E
Chapter 3: Manual Calculations
n!
–
r)!
n!
–
r)!
47
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