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  3. To test a theory. (Shared Birthdays)

To test a theory. (Shared Birthdays)

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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!!!!

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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?

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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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                              M Offline
                              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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                                • 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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                                  Chris Quinn
                                  wrote on last edited by
                                  #46

                                  You would need 367 if one of the people in the room was my younger brother - 29th Feb

                                  ==================================== Transvestites - Roberts in Disguise! ====================================

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                                  • C Chris Quinn

                                    You would need 367 if one of the people in the room was my younger brother - 29th Feb

                                    ==================================== Transvestites - Roberts in Disguise! ====================================

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                                    blackjack2150
                                    wrote on last edited by
                                    #47

                                    Chris Quinn wrote:

                                    You would need 367 if one of the people in the room was my younger brother - 29th Feb

                                    Or my former boss.

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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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                                      AndyStephens
                                      wrote on last edited by
                                      #48

                                      The probability of at least two people sharing the same birthday is 0.5073. Yay, I've found a use for Wolfram Alpha! http://www04.wolframalpha.com/input/?i=same+birthday&f1=23&f=BirthdayProblem.n_23&x=5&y=9[^]

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                                      • A AndyStephens

                                        The probability of at least two people sharing the same birthday is 0.5073. Yay, I've found a use for Wolfram Alpha! http://www04.wolframalpha.com/input/?i=same+birthday&f1=23&f=BirthdayProblem.n_23&x=5&y=9[^]

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                                        blackjack2150
                                        wrote on last edited by
                                        #49

                                        That crashed my IE8.

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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

                                          D Offline
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                                          Dan_Martin
                                          wrote on last edited by
                                          #50

                                          9th May

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