At a movie theatre, the manager announces that they will give a free ticket to the first person in line whose birthday is the same as someone who has already bought a ticket. You have the option of getting in line at any time. Assuming that you don’t know anyone else’s birthday and that birthdays are distributed randomly throughout the year, what position in line gives you the greatest chance of being the first duplicate birthday?
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14 guesses to Birthday Bonus |
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January 7th, 2012 | Category: 
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2nd? Were u can here what they say about there birthday
Nope, that’s not it. Keep trying.
366th position?
Standing behind the first person to guess and say
What they’re birthday is.
No, both Eric and Anant. Neither are correct. Keep trying.
1St cuz they kno there birthday and there 1st?
No, that’s not it either.
The category is a hint: Mathematical. There is a true, statistical answer to the question.
buy a ticket yourself and go in the line first and tell your birthdate! u have a ticket and u know your birthdate!
No, keep trying.
Is it either 367 or 57?
No, that’s not it. Keep trying.
20th?
Correct Bree.
20th position gives you the greatest chance of duplicating a birthday of someone who’s already bought a ticket. For a detailed explanation, please visit:
http://en.wikipedia.org/wiki/Birthday_paradox#First_match
You are today’s winner.
You go 20th place.