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The top documents tagged [r n i r]
4.4 Permutations and Combinations of multisets Multisets :A multiset is a set in which an item may appear more than once.. Sets and multisets are quite
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4.4.2 Combinations of multisets If S is a multiset, a r-combination of S is an unordered selection of r of the objects of S. Thus an r-combination
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