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1. 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 ?





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  • By: guest on 02 Jun 2017 02.07 am
    Since there are socks of only two colours, so two out of any three socks must always be of the same colour.
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