A box contains ten marbles, seven of which are black and three are red. Three marbles are drawn one after the other without replacement. Find the probability of choosing at least two black marbles.?
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Asked by megantheestallion on 23rd May, 2020
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1 week ago
= 1 -(7/0)*(3/3)/(10/3)-(7/1)*(3/2)/(10/3)
= 49/60 or 0.8167