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  3. To test a theory. (Shared Birthdays)

To test a theory. (Shared Birthdays)

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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
    #37

    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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      CPallini
      wrote on last edited by
      #38

      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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        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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            • 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
              #42

              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

                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
                #43

                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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                • 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
                              D Offline
                              Dan_Martin
                              wrote on last edited by
                              #50

                              9th May

                              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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                                ormonds
                                wrote on last edited by
                                #51

                                10 Dec

                                1 Reply Last reply
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                                • L Lost User

                                  Trafalgar Day. (that might make some scratch their heads!)

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                                  ormonds
                                  wrote on last edited by
                                  #52

                                  Now that has to be Oct 30 1805, doesn't it?

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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

                                    J Offline
                                    J Offline
                                    John Oxley
                                    wrote on last edited by
                                    #53

                                    16th of August

                                    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

                                      0 Offline
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                                      0x3c0
                                      wrote on last edited by
                                      #54

                                      July 19th. There's that theory broken ;P

                                      Between the idea And the reality Between the motion And the act Falls the Shadow

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                                      • O ormonds

                                        Now that has to be Oct 30 1805, doesn't it?

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                                        Lost User
                                        wrote on last edited by
                                        #55

                                        No. http://www.bbc.co.uk/history/british/empire_seapower/launch_ani_trafalgar.shtml[^]

                                        modified on Wednesday, August 5, 2009 5:37 AM

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                                        • O ormonds

                                          Now that has to be Oct 30 1805, doesn't it?

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                                          The Real Geek
                                          wrote on last edited by
                                          #56

                                          Hmm, 21st I think, which is a shame because it would have matched mine - 30th Oct :-)

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