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March 27th, 2019, 06:51 AM  #1 
Newbie Joined: Mar 2019 From: Spain Posts: 1 Thanks: 0  The paradox birthday for more than 2 people
Hello. The paradox of birthday is very well known but refers to at least two people. Then, what is the probability if at least 3 people or n people have the same birthday? Thank you. 
March 27th, 2019, 01:23 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,835 Thanks: 733 
3 or n out of how many?

March 27th, 2019, 02:23 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 21,036 Thanks: 2273 
See this article.

March 28th, 2019, 03:24 AM  #4 
Math Team Joined: May 2013 From: The Astral plane Posts: 2,305 Thanks: 962 Math Focus: Wibbly wobbly timeywimey stuff.  
March 28th, 2019, 06:38 AM  #5 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,691 Thanks: 2670 Math Focus: Mainly analysis and algebra  The whole point about being introduced to the birthday paradox (in relation to the mathematics) is to be able to calculate the probabilities yourself. The technique usually used (reframing the problem) is extremely important in probability. You should be able to work out the probabilities for yourself once you've seen it done for two people.


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birthday, paradox, people 
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