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There are 3 red socks, 4 green socks and 3 blue socks, you choose 2 socks. The probability that they are of the same colour is _____. 

(A) 1/5 

(B) 7/30 

(C) 1/4 

(D) 4/15

1 Answer

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Best answer

Correct option is (D) 4/15

Required probability = 3C\(_2\) + 4C\(_ 2\) + 3C\(_ 2\)  / 10C\(_ 2\) = 4/15

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