BIRTHDAYS ON SAME DAY TIMES 2

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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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There are 12 people in our office. Two of them share a birthday. Therefore the odds of this are 16.7% (1- 364/365 * 363/365*362/365*...354/365). Hope this maths is correct. BUT my problem is that another pair of people share a birthday (on a different day). What are the odds of this happening? Thanks
Total votes: 227
Date submitted:Wed, 24 Oct 2012 13:06:35 +0000Coincidence ID:6637