A box contains 10 marbles,7 of which are black and 3 are red .Two marbles...

A box contains 10 marbles,7 of which are black and 3 are red .Two marbles are drawn one after the other without replacement. Find the probability of getting
a).a red,then a black marble
b).two black marbles?

In Mathematics
1 Answers Available
Asked by Brie on 25th August, 2020

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