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Mathematics, 29.09.2019 16:20 edisonsitesuper9312

Jack bought 7 new shirts at the store today, and he plans to pack 2 of them to wear on a trip that will last 2 days. how many sequences of 2 shirts are possible?

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Jack bought 7 new shirts at the store today, and he plans to pack 2 of them to wear on a trip that w...
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