Q: John has 10pairs of dark blue socks and 10pairs of black socks. He keeps them all in the same bag. If he picks out 3socks at random, then what is the probability thathe will get a matching pair?\nOptions:\n(A) 1\n(B) 3\n(C) 5\n(D) 8\n(E) 9 Let's give some random thoughts before answering.
User
If he draws any combination of 3 socks he will definitely have the matching pair of either colour.
Therefore, the answer is (A).
Assistant