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A bag contains 3 red, 4 black and 5 gree...

A bag contains 3 red, 4 black and 5 green balls of the same size. A ball is drawn at random from the bag. What is the probability that the ball drawn is (i) red? (ii) not black? (iii) black ?

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The correct Answer is:
`(i)1/4" "(ii)2/3" "(iii)1/3`
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