# Function combinationsWithRep Compute the number of ways of picking `k` unordered outcomes from `n` possibilities, allowing individual outcomes to be repeated more than once. CombinationsWithRep only takes integer arguments. The following condition must be enforced: k <= n + k -1. ## Syntax ```js math.combinationsWithRep(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 with replacement. ## Examples ```js math.combinationsWithRep(7, 5) // returns 462 ``` ## See also [combinations](combinations.md), [permutations](permutations.md), [factorial](factorial.md)