# Function multinomial Multinomial Coefficients compute the number of ways of picking a1, a2, ..., ai unordered outcomes from `n` possibilities. multinomial takes one array of integers as an argument. The following condition must be enforced: every ai <= 0 ## Syntax ```js math.multinomial(a) // a is an array type ``` ### Parameters Parameter | Type | Description --------- | ---- | ----------- `a` | number[] | BigNumber[] | Integer numbers of objects in the subset ### Returns Type | Description ---- | ----------- Number | BigNumber | Multinomial coefficient. ## Examples ```js math.multinomial([1,2,1]) // returns 12 ``` ## See also [combinations](combinations.md), [factorial](factorial.md)