SOLUTION: There are 5 black marbles, 2 yellow marbles , 1 blue marble and 4 red marbles in a bag. you select 2 marbles without replacement. what is the probability that both marbles are blac
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Question 1036903: There are 5 black marbles, 2 yellow marbles , 1 blue marble and 4 red marbles in a bag. you select 2 marbles without replacement. what is the probability that both marbles are black?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
There are 12 marbles
Probability first is black is 5/12
Once chosen, there are 11 marbles left and 4 are black.
Probability of picking a black one is 4/11.
The product is (5/12)(4/11)=20/132 or 5/33.
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