1. #1
    JohnGalt2341
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    The Birthday Problem. Set the line...

    Imagine that you work for a Sporstbook and you are in charge of Setting this Line: There are 23 random people in a room... what are the odds that 2 of them share the same Birthday(not year). Set the line:

    Yes, 2 of them have the same Birthday.

    No, none of them have the same Birthday.
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  2. #2
    jgilmartin
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    Yes -112
    No -108

  3. #3
    UntilTheNDofTimE
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    Yes +1400
    No -1800
    Last edited by UntilTheNDofTimE; 01-27-12 at 08:25 PM.

  4. #4
    milwaukee mike
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    yes -110
    no -110

  5. #5
    antifoil
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    50.632301%

  6. #6
    mathdotcom
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    Quote Originally Posted by milwaukee mike View Post
    yes -110
    no -110
    Correct

    But I prefer to be more positive

    yes -105
    no -105

  7. #7
    JohnGalt2341
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    Damn... you guys are too good. I guess I'm the last person to know about this. Can I bet Yes at your Sportsbook UntilTheNDofTimE?

  8. #8
    UntilTheNDofTimE
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    Quote Originally Posted by mathdotcom View Post
    Correct But I prefer to be more positive yes -105 no -105
    im sure the op will explain after but how is this a even proposition. Ive met thousands in my lifetime and only had 1 who had the same birthday as mine and only know a handful of people who share birthdays. 23 random people in a room would yield a nearly 50% proposition? interesting.

  9. #9
    UntilTheNDofTimE
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    Quote Originally Posted by JohnGalt2341 View Post
    Damn... you guys are too good. I guess I'm the last person to know about this. Can I bet Yes at your Sportsbook UntilTheNDofTimE?
    sure cause mine isnt open for business, already got busted

  10. #10
    JohnGalt2341
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    With just 57 people it becomes a 99% chance.

  11. #11
    antifoil
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    http://en.wikipedia.org/wiki/Birthday_problem

    i just used google to find the answer.

  12. #12
    UntilTheNDofTimE
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    Quote Originally Posted by antifoil View Post
    http://en.wikipedia.org/wiki/Birthday_problem i just used google to find the answer.
    just searched now

  13. #13
    FourLengthsClear
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    Quote Originally Posted by UntilTheNDofTimE View Post
    im sure the op will explain after but how is this a even proposition. Ive met thousands in my lifetime and only had 1 who had the same birthday as mine and only know a handful of people who share birthdays. 23 random people in a room would yield a nearly 50% proposition? interesting.
    It is not a question of them sharing a birthday with only you. Any 2 of the 23 people can share a birthday for the result to be YES.
    Last edited by FourLengthsClear; 01-27-12 at 08:48 PM.

  14. #14
    UntilTheNDofTimE
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    Quote Originally Posted by FourLengthsClear View Post
    It is not a question of them sharing a birthday with only you. Any 2 of the 23 people can share a birthday for the result to be YES.
    I took that into consideration still found it somewhat farfetched, after reading into it i understand.

  15. #15
    antifoil
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    what you need is a birthday distribution chart if you want to bet those odds. if you can find some clumping of birthday's wouldn't yes be a +EV bet?

  16. #16
    UntilTheNDofTimE
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    Quote Originally Posted by antifoil View Post
    what you need is a birthday distribution chart if you want to bet those odds. if you can find some clumping of birthday's wouldn't yes be a +EV bet?
    Everyone ***** in the holiday season. Many august n september birthdays

  17. #17
    milwaukee mike
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    Quote Originally Posted by UntilTheNDofTimE View Post
    Everyone ***** in the holiday season. Many august n september birthdays


    i have a theory here - almost all the people i know with november/december birthdays are FEMALE.

    since we all start out female until about the 2nd or 3rd month, i thought it's so damn hot and humid here in june/july that babies are too hot/lazy to change into males

  18. #18
    JohnGalt2341
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    Quote Originally Posted by milwaukee mike View Post
    since we all start out female until about the 2nd or 3rd month
    I think this is why men have nipples?

    I have a theory on Birthdays too... I was the 5th born in my family. My parents had me in their early 30's. I like to pretend that they only had sex a total of 5 times but I came up with a different theory that isn't too far off. Birthday sex... I was born just slightly 9 months after my Mom's birthday. And I was slightly late... If I was given -110 odds I would be willing to be that I was conceived on my Mothers birthday. Anyone else have this experience? Do the math. I just figured this out a couple of years ago.

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