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Questions about finite and infinite sets and multisets, related data structures and concepts.

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How to find number of combinations of choosing one from k subsets

Consider we have set S: S = {1,2,3,4,5,6} and 3 (say k) subsets of S: S_1 = {1,2,3} S_2 = {2,3,4,5} S_3 = {1,3,6} What is the total number of cases choosing one element from each subsets? Same …
Bumsik Kim's user avatar