The Clarks of Ashford
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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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In 1987 two people got married; one from Holland one from England. Mr Clark's birthday is on 21 December and his grandfather's birthday was on 22 December. His wife, Mrs Clark, has her birthday on 24 December and her grandfather's birthday was on 23 December. This was not discovered until some time after they had met. Although Mr & Mrs Clark have birthdays that are only just over a year apart, the grandfathers had some years between them.
Also, Mr Clark's mother shares a birthday with a sister of Mrs Clark's mother. Mrs Clark's mother shared a birthday with Mr Clark's grandmother. The son of Mrs Clark's sister was born on the 25 September and Mr Clark's brother was born on 24 September.
What is the chance of this?
Date submitted:Wed, 24 Oct 2012 19:55:23 +0000Coincidence ID:6640
