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# Factorials and Combinations

## Choosing one or more objects from a set when order doesn't matter.

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Factorials and Combinations

### Vocabulary Language: English

!

!

The factorial of a whole number $n$ is the product of the positive integers from 1 to $n$. The symbol "!" denotes factorial. $n! = 1 \cdot 2 \cdot 3 \cdot 4...\cdot (n-1) \cdot n$.
combination

combination

Combinations are distinct arrangements of a specified number of objects without regard to order of selection from a specified set.
factorial

factorial

The factorial of a whole number $n$ is the product of the positive integers from 1 to $n$. The symbol "!" denotes factorial. $n! = 1 \cdot 2 \cdot 3 \cdot 4...\cdot (n-1) \cdot n$.
Permutation

Permutation

A permutation is an arrangement of objects where order is important.
Probability

Probability

Probability is the chance that something will happen. It can be written as a fraction, decimal or percent.