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23 and Football Birthdays - Numberphile

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Uploaded on Feb 14, 2012

What's the probability that two people on the football/soccer pitch share a birthday? That's only 23 people (22 players and the ref, as long as there have been no red cards or injuries!!!) and there are 365 days in a normal year.

Dr James Grime explains. Our thanks to Nottingham Forest Football Club.

Website: http://www.numberphile.com/
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Videos by Brady Haran

Brady's other channels include:
http://www.youtube.com/periodicvideos (Chemistry stuff)
http://www.youtube.com/sixtysymbols (Physics and astronomy)
http://www.youtube.com/numberphile (Numbers and maths)
http://www.youtube.com/DeepSkyVideos (Space stuff)
http://www.youtube.com/nottinghamscience (Science and behind the scenes)
http://www.youtube.com/foodskey (Food science)
http://www.youtube.com/BackstageScience (Big science facilities)
http://www.youtube.com/favscientist (Favourite scientists)
http://www.youtube.com/bibledex (Academic look at the Bible)
http://www.youtube.com/wordsoftheworld (Modern language and culture)

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