# A bag contains 4 white balls, 5 red balls, 2 black balls and 4 green balls. A ball is drawn at random from the bag. Find the probability that it is (i

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A bag contains 4 white balls, 5 red balls, 2 black balls and 4 green balls. A ball is drawn at random from the bag. Find the probability that it is (i) black, (ii) not green ,(iii) red or white, (iv) neither red nor green.

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Correct Answer -  (i) 2/15 (ii) 11/15 (iii) 3/5 (iv) 2/5
Total number of balls = 4+5+2+4 = 15.
(i) Number of black balls = 2.
P(getting a black ball) = 2/15.
(ii) Number of balls which are not green =  4+5+2= 11.
P(getting a ball which is not green)  11/15.
(iii) Number of balls which are red or white = 5 +4 = 9 .
P(getting a ball which is red or white ) =  9/15 = 3/5.
(iv) Number of balls which are neither red nor green = 4+2 = 6.
P(getting a ball which is neither red nor green ) =  6/15 = 2/5.