Everything about Combination totally explained
In
combinatorial mathematics, a
combination is an un-ordered collection of unique sizes. (An ordered collection is called a
permutation.) Given
S, the
set of all possible unique elements, a combination is a
subset of the elements of
S. The order of the elements in a combination isn't important (two lists with the same elements in different orders are considered to be the same combination). Also, the elements can't be repeated in a combination (every element appears uniquely once); this is often referred to as "without replacement/repetition". This is because combinations are defined by the elements contained in them, thus the set = 2598960.
You get the same result for
as for
k. Therefore, when
k is more than half of
n, it may be easier to compute using
in place of
k.
Further Information
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