Difference between revisions of "Documentation/How Tos/Calc: COMBIN function"
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| − | + | * [[Documentation/How_Tos/Calc: PERMUT function|PERMUT]] | |
| − | + | * [[Documentation/How_Tos/Calc: PERMUTATIONA function|PERMUTATIONA]]''' | |
| − | + | * [[Documentation/How_Tos/Calc: Mathematical functions|Mathematical functions]]''' | |
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Revision as of 13:35, 25 February 2009
COMBIN
Returns the number of combinations of a subset of items.
Syntax:
COMBIN(n; k)
- n is the number of items in the set.
- k is the number of items to choose from the set.
- COMBIN returns the number of ways to choose these items. For example if there are 3 items A, B and C in a set, you can choose 2 items in 3 different ways, namely AB, AC and BC.
- COMBIN implements the formula:
- n!/(k!(n-k)!)
Example:
COMBIN(3,2)
- returns 3.
