Question: A man wears socks of two colours – Black and brown. He has altogether 20 black socks and 20 brown socks in a drawer. Supposing he has to take out the socks in the dark, how many must he take out to be sure that he has a matching pair ?
[A].3
20
39
None of these
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
Since there are socks of only two colours, so two out of any three socks must always be of the same colour.