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44 lines
837 B
Markdown
44 lines
837 B
Markdown
# Function combinations
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Compute the number of ways of picking `k` unordered outcomes from `n`
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possibilities.
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Combinations only takes integer arguments.
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The following condition must be enforced: k <= n.
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## Syntax
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```js
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math.combinations(n, k)
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```
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### Parameters
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Parameter | Type | Description
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--------- | ---- | -----------
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`n` | Number | BigNumber | Total number of objects in the set
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`k` | Number | BigNumber | Number of objects in the subset
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### Returns
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Type | Description
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---- | -----------
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Number | BigNumber | Number of possible combinations.
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## Examples
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```js
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math.combinations(7, 5); // returns 21
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```
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## See also
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[permutations](permutations.md),
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[factorial](factorial.md)
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