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A bag contains 6 red and 4 black balls. Two balls are drawn at random without replacement. The probability that both balls are of the same…

1459Medium DSSSB TGT Computer Science 0 replies 1 views

A bag contains 6 red and 4 black balls. Two balls are drawn at random without replacement. The probability that both balls are of the same colour is

Correct answer: D

Explanation

Favourable ways = C(6, 2) + C(4, 2) = 15 + 6 = 21 out of C(10, 2) = 45, so the probability is 21/45 = 7/15.

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