Documentation/How Tos/Calc: COMBIN function

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.

See also:

COMBINA, PERMUT, PERMUTATIONA

Mathematical functions

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