# Function combinations #

Compute the number of ways of picking `k`

unordered outcomes from `n`

possibilities.

Combinations only takes integer arguments. The following condition must be enforced: k <= n.

## Syntax #

```
math.combinations(n, k)
```

### Parameters #

Parameter | Type | Description |
---|---|---|

`n` |
number | BigNumber | Total number of objects in the set |

`k` |
number | BigNumber | Number of objects in the subset |

### Returns #

Type | Description |
---|---|

number | BigNumber | Number of possible combinations. |

## Examples #

```
math.combinations(7, 5) // returns 21
```