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Random number generation, Permutations and combinations, Factorials – Casio FX 65 User Manual

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FX 65 Training guide

Probability


Random number generation

[SHIFT] [RAN#]

Generates a random number between 0 and 0.999.


Permutations and combinations

[SHIFT] [nPr]

A permutation is a selection of objects in which the order matters.

Example: To determine the number of possible different
arrangements using 4 items selected from 10 items.

[10] [SHIFT] [nPr] [4] [=] 5040


[SHIFT] [nCr]

A combination is a selection of objects from a collection and order
is irrelevant.

Example: To determine the number of different combinations of 4
items selected from 10 items. [10] [SHIFT] [nCr] [4] [=] 210


Factorials

[SHIFT] [x!]

Calculates the factorial of a number. Example: [5] [SHIFT] [!]


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References the Casio FX-65 User’s Guide

Casio FX-65 Fraction calculator