On Sat, 2010-03-27 at 18:16 +0000, Dave Cross wrote: > On 03/27/2010 09:10 AM, Luis Motta Campos wrote: > > Dave Cross wrote: > >> On 03/27/2010 08:13 AM, Uri Guttman wrote: > >> > >>> and paul and i share the same birthday. not sure what that means. > >> > >> I expect you'll find it's a coincidence :-) > > > > As a mathematician I must say coincidences have really low probability > > of happening... > > Given the number of people who have birthdays and the relatively small > number of days available to have them on - you might want to recheck > your working there :)
This is a common example given when pointing out that people don't understand probability theory. http://en.wikipedia.org/wiki/Birthday_problem In a group of at least 23 randomly chosen people, there is more than 50% probability that some pair of them will have the same birthday. [...] For 57 or more people, the probability is more than 99%
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