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  3. To test a theory. (Shared Birthdays)

To test a theory. (Shared Birthdays)

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  • M Marc Clifton

    My birthday (month, day, not year) is the same as Bill Clinton's. :cool: Explains a lot. :doh: Marc

    Will work for food. Interacx

    I'm not overthinking the problem, I just felt like I needed a small, unimportant, uninteresting rant! - Martin Hart Turner

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    Mark_Wallace
    wrote on last edited by
    #26

    Marc Clifton wrote:

    My birthday (month, day, not year) is the same as Bill Clinton's.

    So you don't know the difference between European and African?

    I wanna be a eunuchs developer! Pass me a bread knife!

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    • M Mark_Wallace

      Marc Clifton wrote:

      My birthday (month, day, not year) is the same as Bill Clinton's.

      So you don't know the difference between European and African?

      I wanna be a eunuchs developer! Pass me a bread knife!

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      Mark_Wallace
      wrote on last edited by
      #27

      25th July, btw. And a quick head reckoning says that it's 39-40 people for an evens chance. Of course, it's 6.30 am, here, so my arithmetic might not be all that it can be.

      I wanna be a eunuchs developer! Pass me a bread knife!

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      • D Dalek Dave

        Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

        ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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        Jwalant Natvarlal Soneji
        wrote on last edited by
        #28

        18th Sept. Anyone? . . . No one... :)

        Jwalant Natvarlal Soneji, BE IT, India

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        • D Dalek Dave

          Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

          ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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          NandoMan
          wrote on last edited by
          #29

          I believe you are a bit wrong. If you have 366 people, you can guarantee that at least 2 people share birthdays. It´s called "the Pigeonhole principle" http://en.wikipedia.org/wiki/Pigeonhole_principle[^]

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          • D Dalek Dave

            Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

            ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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            Alan Burkhart
            wrote on last edited by
            #30

            18 January

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            • M Mike Ellison

              November 6. If anyone wants to send me a present then, let me know :-)

              www.MishaInTheCloud.com

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              Jorgen Sigvardsson
              wrote on last edited by
              #31

              Yay! Mine's also November 6. :)

              -- Kein Mitleid Für Die Mehrheit

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              • D Dalek Dave

                Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

                ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                Reelix
                wrote on last edited by
                #32

                12 June, and all alone...

                -= Reelix =-

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                • D Dalek Dave

                  Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

                  ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                  cable beach
                  wrote on last edited by
                  #33

                  Actually, i think they share the same month, not the exact date. This is a theory of combinatorics (the pigeon hole principle) rather than probability. In any event: 13th February

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                  • D Dalek Dave

                    Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

                    ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                    Aamir Butt
                    wrote on last edited by
                    #34

                    20th December

                    Bombing for Peace is like f****ing For Virginity" My Articles

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                    • D Dalek Dave

                      Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

                      ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                      Hornwood509
                      wrote on last edited by
                      #35

                      7th January

                      -- For a moment, nothing happened. Then, after a second or so, nothing continued to happen --

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                      • N NandoMan

                        I believe you are a bit wrong. If you have 366 people, you can guarantee that at least 2 people share birthdays. It´s called "the Pigeonhole principle" http://en.wikipedia.org/wiki/Pigeonhole_principle[^]

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                        blackjack2150
                        wrote on last edited by
                        #36

                        The way I know it: If you have 366 people in a room, it's guaranteed (100%) that at least 2 share their birthday, which is obvious. If you have 23 people in a room, it's likely (> 50%) that at least 2 share their birthday, which is not obvious, but it's mathematically proved to be true.

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                        • D Dalek Dave

                          Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

                          ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                          CPallini
                          wrote on last edited by
                          #37

                          19th Jun.

                          If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                          This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                          [My articles]

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                          • D Dalek Dave

                            Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

                            ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                            smcnulty2000
                            wrote on last edited by
                            #38

                            June 7. First day of Vestalia.

                            _____________________________ Will work for ... BRAINS!!! BRAINS!!!!

                            1 Reply Last reply
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                            • D Dalek Dave

                              Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

                              ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                              Johann Gerell
                              wrote on last edited by
                              #39

                              July 16. When can we se your analysis of this experiment? ;)

                              -- Time you enjoy wasting is not wasted time - Bertrand Russel

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                              • C Christian Graus

                                17 Feb

                                Christian Graus Driven to the arms of OSX by Vista. Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

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                                kduffingb
                                wrote on last edited by
                                #40

                                17 Feb also :laugh: :laugh:

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                                • O Oakman

                                  Jun 10

                                  Jon "One loves to possess arms, though they hope never to have occasion for them." --Thomas Jefferson to George Washington, 1796. Soap Box 1.0: the first, the original, reborn troll-less

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                                  JDL EPM
                                  wrote on last edited by
                                  #41

                                  Oakman wrote:

                                  Jun 10

                                  Does it count if this is my wife's birthday?

                                  O 1 Reply Last reply
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                                  • D Dalek Dave

                                    Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

                                    ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                                    Mustafa Ismail Mustafa
                                    wrote on last edited by
                                    #42

                                    February 12

                                    If the post was helpful, please vote, eh! Current activities: Book: Devils by Fyodor Dostoyevsky Project: Hospital Automation, final stage Learning: Image analysis, LINQ Now and forever, defiant to the end. What is Multiple Sclerosis[^]?

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                                    • J Johann Gerell

                                      July 16. When can we se your analysis of this experiment? ;)

                                      -- Time you enjoy wasting is not wasted time - Bertrand Russel

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                                      Dalek Dave
                                      wrote on last edited by
                                      #43

                                      I will publish an analysis later today, but already there are several shared birthdays.

                                      ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                                      • D Dalek Dave

                                        I will publish an analysis later today, but already there are several shared birthdays.

                                        ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                                        Mustafa Ismail Mustafa
                                        wrote on last edited by
                                        #44

                                        So long as we get presents...

                                        If the post was helpful, please vote, eh! Current activities: Book: Devils by Fyodor Dostoyevsky Project: Hospital Automation, final stage Learning: Image analysis, LINQ Now and forever, defiant to the end. What is Multiple Sclerosis[^]?

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                                        • D Dalek Dave

                                          Young Henry mentioned his mother's Birthday below and it reminded me of a probability experiment that states if 23 people are in a room, it is more likely than less that 2 of them share a birthday. What date is your birthday people? Mine is 31st March. Let us see if the first 23 posters to this can get a matching pair?

                                          ------------------------------------ "When Belly Full, Chin Hit Chest" Confucius 502BC

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                                          Pete OHanlon
                                          wrote on last edited by
                                          #45

                                          This is just basic probability. One of my favourite maths experiments is to ask people whether or not they are more likely to roll two consecutive 6s with a dice or a 2 then a 3.

                                          "WPF has many lovers. It's a veritable porn star!" - Josh Smith

                                          As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

                                          My blog | My articles | MoXAML PowerToys | Onyx

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