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Six children are each offered a single scoop of any of 3 flavors of ice cream from the Combinatorial Creamery. In how many ways can each child choose a flavor for their scoop of ice cream so that each flavor of ice cream is selected by at least two children?

 Nov 23, 2022
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have you tried complemetary counting? Otherwise a wise person once said use the binomial theorem

 Nov 24, 2022

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