Sisters with same Birthday

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understandinguncertainty.org was produced by the Winton programme for the public understanding of risk based in the Statistical Laboratory in the University of Cambridge. The aim was to help improve the way that uncertainty and risk are discussed in society, and show how probability and statistics can be both useful and entertaining.

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I was born on 25th June, 1939 and my sister was born the same date, 25th June 1946, i.e. 7 years apart. Our Father and his sister were born on the same date, 1st August, our father 1909, and his sister 7 years later.
Total votes: 243
Date submitted:Sat, 14 Jan 2012 15:01:47 +0000Coincidence ID:4102