Atom - c - Combinations

Characters: c

Tags: math , number , vectorize , combinatorics

Arity: dyadic

This atom is dyadic, which means it takes two arguments.

Functionality

Return xCy (the number of ways of choosing y out of x objects).

Details

xCy is the number of ways to select y objects out of a set of x objects, where the order does not matter. This can be represented as x! / [ y! (x - y)! ].