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Mathematics, 12.05.2021 17:00 oliviacolaizzi

A box contains 7 red marbles, 4 white marbles, and 5 blue marbles. If only white marbles are added to the box, how many must be added to make the probability of dfawing a white marble 1/3?​

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A box contains 7 red marbles, 4 white marbles, and 5 blue marbles. If only white marbles are added t...
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