Posted by Tahmina on Sunday, September 16, 2012 at 11:24am.
how many socks would you need to remove from a drawer containing 10 blue socks, 15 black socks and 5 red socks, to in sure that you have at least 2 matching socks?

Math  bobpursley, Sunday, September 16, 2012 at 11:40am
You hardest time matching is if you picked one of each before you picked the second.
So, pick one blue, one black, one red, then pick one more. You have to get a matched pair in four picks. 
Math  Anonymous, Friday, December 12, 2014 at 10:38am
Drawer containing 8 red socks 10 while socks and 4 blue socks