Combination versus Permutation comparison chart
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Introduction (from Wikipedia) In mathematics, a combination is a way of selecting members from a grouping, such that the order of selection does not matter. In smaller cases it is possible to count the number of combinations. In mathematics, the notion of permutation relates to the act of arranging all the members of a set into some sequence or order, or if the set is already ordered, rearranging its elements, a process called permuting.

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