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 ? Choose the correct choice from the following choices.
A) 3 B) 10 C) 20 D) 39 E) None of these
3 socks must be taken out to be sure that he has a matching pair .   3NSWER:3
<result>A</result>
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 ?