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Mathematics, 04.03.2021 02:20 ayoismeisjjjjuan

A bag contains 7 marbles. Some marbles are red and some are blue. If the probability of drawing two blue marbles is 10/21 how many blue marbles were in the bag when the experiment started? A.3
B.4
C.5
D.6

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A bag contains 7 marbles. Some marbles are red and some are blue. If the probability of drawing two...
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