Talk:Twelvefold way

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I see that a permutation is an ordered selection with out repetition (injective) and a combination is an unordered selection with out repetition (injective). What is an unordered selection with repetition (non-injective) called? Is there an article for that? WilliamKF 15:48, 5 October 2007 (UTC)

It's a multiset. /P¤ntus 14:02, 8 November 2007 (UTC)