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Birthday Line (Posted on 2004-03-29) Difficulty: 3 of 5
At a movie theater, 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, that birthdays are distributed randomly throughout the year, etc., what position in line gives you the greatest chance of being the first duplicate birthday?

from http://www.ocf.berkeley.edu/~wwu/riddles/hard.shtml

See The Solution Submitted by Victor Zapana    
Rating: 3.5556 (9 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: No Subject | Comment 8 of 21 |
(In reply to No Subject by hunter)

If you are 183 in line, the odds are overwhelming that at least someone ahead of you has duplicated a previous birthday, and since only the first such duplicate wins, you are out of luck.
  Posted by Charlie on 2004-03-30 08:37:50

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