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there are 3 black marbles and 4 red marbles in a bag what is the probability or picking two black marbles
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there are 3 black marbles and 4 red marbles in a bag what is the probability or picking two black marbles

User Namth
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there are 3  + 4 total marbles, 7 then, so the sample space is 7, since there are 3 black ones, that's the favorable outcomes, thus 3/7.
User Mike Ortiz
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