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Social Studies, 07.10.2019 22:10 samjohnson2383

Ten people are sitting in a circle of ten chairs, chewing gum. each person spits out his or her gum and places it either under his or her own chair or under an immediately adjacent chair. how many ways can this happen such that every chair ends up with exactly one piece of gum under it?

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Ten people are sitting in a circle of ten chairs, chewing gum. each person spits out his or her gum...
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