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Stolb23 [73]
2 years ago
14

a bag contains 4 white marbles , 7 red marbles , and 5 black marbles. you randomly select 3 marbles from the bag. without replac

ement.the random variable represents the number of black marbles
Mathematics
1 answer:
Ksivusya [100]2 years ago
8 0
That variable from the number of black marble divide by all marble.
5/4+7+5 = 0.3125
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