A statistician keeps a simple wardrobe. He only purchases pairs of black socks and white socks, and he keeps all of the socks in a pile in the drawer. Recently one of the socks was lost in the laundry. The socks have a mathematical property. If you select two socks at random from the drawer, the socks will match in color exactly 50% of the time. The statistician owns more than 200 socks but less than 250 socks, and there are more black socks than white socks. How many socks of each color are there? And which color sock was lost in the laundry?

My blog post for this video
http://wp.me/p6aMk-4Ye

Source of problem
http://puzzling.stackexchange.....com/questions/9632/m

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