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Murari has 9 pair of dark blue socks and 9 pair of black socks. He keeps them all in the same bag. If he picks out three socks at random What is the probability that he will get a matching pair?
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- 9c3 x 9c1/ 18c3
- 2 x 9c3 x 9c1/ 18c3
- 1
- 4/7
- None of the above
Correct Option: C
Since, there are only two types of socks in the bag. so, if murari pick up 3 socks then certainly two of them are of same type. Thus this is a certain event.
Hence required probability = 1
