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Results tagged with combinatorics
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user 1010237
For questions about the study of finite or countable discrete structures, especially how to count or enumerate elements in a set (perhaps of all possibilities) or any subset. It includes questions on permutations, combinations, bijective proofs, and generating functions.
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Drawing tickets without replacment until same number appears twice [closed]
8 tickets are in a box. Two are marked 1, two are marked 2, two are marked 3, and two are marked 4. Tickets are drawn randomly from the box without replacement until a number appears twice. What will …
