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Permutation

usgb/ˌpɜːrmjuˈteɪʃn/Volume
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Math SpecificPlay
Used in math to describe all possible orders of a set, important for probability and statistics. SlideBy calculating the permutations, we determine all possible outcomes.
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Fixed OrderPlay
Unlike combinations, every permutation has a unique sequence that matters a lot. SlideChanging the permutation of a lock's code can prevent it from opening.
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Not InterchangeablePlay
Sequence is key; swapping elements changes the permutation, producing a different arrangement. SlideIn a race, permutations of finishers determine the exact rankings.