white and the second is black? (BDU \textendash{} Apr. 96) 53. An urn contains 3 white balls, 4 red balls and 5 black balls. Two balls are drawn from the urn at random. Find the probability that (i) both of them are of the same colour and (ii) they are of different colours.
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Total number of balls = 3 white + 4 red + 5 black = 12 balls Total number of ways to draw 2 balls from 12 balls = 12C2 = 66 ways Show more…
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