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Common Misbeliefs
O, The Oprah Magazine  |  From the March 2009 issue of O, The Oprah Magazine
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Heads, You Win

We've always assumed that a coin toss is a 50-50 proposition, but Stanford mathematics and statistics professor Persi Diaconis has found that a flipped coin is biased to land on the same side it starts on—and will do so about 51 percent of the time.
Printed from Oprah.com on Friday, May 24, 2013
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