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Mathematics, 17.04.2021 22:10 evazquez

A jar contains 20 marbles: 6 are brown, 2 are gray, 5 are black, and 7 are white. A black marble is removed and replaced before a gray one is removed.

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A jar contains 20 marbles: 6 are brown, 2 are gray, 5 are black, and 7 are white. A black marble is...
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