MathDiscrete mathCombinatorics

Combinations

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Combination
Permutation
PnkP_{n}^k
CnkC_{n}^k
An ordered selection of elements from a set.
The number of unordered selections of kk elements taken from the set of nn elements
The number of ordered selections of kk elements taken from the set of nn elements
An unordered selection of elements from a set.
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