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Maths problem 2

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  • L Lost User

    I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?

    D Offline
    D Offline
    Doctor Nick
    wrote on last edited by
    #2

    42

    ------------------------------------- Do not do what has already been done. Absolute power corrupts absolutely.. but it ROCKS absolutely, too.

    1 Reply Last reply
    0
    • L Lost User

      I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?

      H Offline
      H Offline
      hairy_hats
      wrote on last edited by
      #3

      13/27?

      CPalliniC L 2 Replies Last reply
      0
      • L Lost User

        I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?

        D Offline
        D Offline
        Dalek Dave
        wrote on last edited by
        #4

        I will rule myself out of this one as I know the answer having just heard it on Radio 4 :)

        ------------------------------------ I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave

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        • L Lost User

          I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?

          Brian C HartB Offline
          Brian C HartB Offline
          Brian C Hart
          wrote on last edited by
          #5

          Unless, of course, your two children are twins. If they are twins, and they are identical, then the probability is 100% since identical twins always are of the same gender. If not, then the probability is 50%. If the children are not twins, the fact that the boy was born on a Tuesday is irrelevant.

          Sincerely Yours, Brian Hart

          L 1 Reply Last reply
          0
          • L Lost User

            I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?

            realJSOPR Offline
            realJSOPR Offline
            realJSOP
            wrote on last edited by
            #6

            Zero. You don't have enough testosterone yourself to father a boy.

            .45 ACP - because shooting twice is just silly
            -----
            "Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
            -----
            "The staggering layers of obscenity in your statement make it a work of art on so many levels." - J. Jystad, 2001

            L 1 Reply Last reply
            0
            • L Lost User

              I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?

              L Offline
              L Offline
              Lost User
              wrote on last edited by
              #7

              I just ate some watermelon. What is the probability that the probability that I have a boy who was born on a Tuesday?

              L 1 Reply Last reply
              0
              • L Lost User

                I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?

                CPalliniC Offline
                CPalliniC Offline
                CPallini
                wrote on last edited by
                #8

                Friday. :)

                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]

                In testa che avete, signor di Ceprano?

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                • Brian C HartB Brian C Hart

                  Unless, of course, your two children are twins. If they are twins, and they are identical, then the probability is 100% since identical twins always are of the same gender. If not, then the probability is 50%. If the children are not twins, the fact that the boy was born on a Tuesday is irrelevant.

                  Sincerely Yours, Brian Hart

                  L Offline
                  L Offline
                  Lost User
                  wrote on last edited by
                  #9

                  Brian C. Hart, Ph.D. wrote:

                  the fact that the boy was born on a Tuesday is irrelevant

                  On the contrary it has everything to do with it.

                  1 Reply Last reply
                  0
                  • realJSOPR realJSOP

                    Zero. You don't have enough testosterone yourself to father a boy.

                    .45 ACP - because shooting twice is just silly
                    -----
                    "Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
                    -----
                    "The staggering layers of obscenity in your statement make it a work of art on so many levels." - J. Jystad, 2001

                    L Offline
                    L Offline
                    Lost User
                    wrote on last edited by
                    #10

                    I already have. And anyway shut your mouth or ill go and 1 vote some of your articles.

                    realJSOPR E 2 Replies Last reply
                    0
                    • H hairy_hats

                      13/27?

                      CPalliniC Offline
                      CPalliniC Offline
                      CPallini
                      wrote on last edited by
                      #11

                      That is 0.

                      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]

                      In testa che avete, signor di Ceprano?

                      H 1 Reply Last reply
                      0
                      • H hairy_hats

                        13/27?

                        L Offline
                        L Offline
                        Lost User
                        wrote on last edited by
                        #12

                        Correct!

                        H 1 Reply Last reply
                        0
                        • L Lost User

                          I already have. And anyway shut your mouth or ill go and 1 vote some of your articles.

                          realJSOPR Offline
                          realJSOPR Offline
                          realJSOP
                          wrote on last edited by
                          #13

                          Buying, renting, and adopting kids doesn't count.

                          .45 ACP - because shooting twice is just silly
                          -----
                          "Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
                          -----
                          "The staggering layers of obscenity in your statement make it a work of art on so many levels." - J. Jystad, 2001

                          1 Reply Last reply
                          0
                          • L Lost User

                            I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?

                            A Offline
                            A Offline
                            Abhinav S
                            wrote on last edited by
                            #14

                            I don't know.

                            My signature "sucks" today

                            1 Reply Last reply
                            0
                            • L Lost User

                              I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?

                              Brian C HartB Offline
                              Brian C HartB Offline
                              Brian C Hart
                              wrote on last edited by
                              #15

                              Null hypothesis probability of 0.02.

                              Sincerely Yours, Brian Hart

                              1 Reply Last reply
                              0
                              • L Lost User

                                I already have. And anyway shut your mouth or ill go and 1 vote some of your articles.

                                E Offline
                                E Offline
                                Enver Maroshi
                                wrote on last edited by
                                #16

                                How does your wife get along with your neighbor?

                                1 Reply Last reply
                                0
                                • L Lost User

                                  Correct!

                                  H Offline
                                  H Offline
                                  hairy_hats
                                  wrote on last edited by
                                  #17

                                  I read the article too...

                                  1 Reply Last reply
                                  0
                                  • L Lost User

                                    I just ate some watermelon. What is the probability that the probability that I have a boy who was born on a Tuesday?

                                    L Offline
                                    L Offline
                                    Luc Pattyn
                                    wrote on last edited by
                                    #18

                                    watermelons need more time. :)

                                    Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]


                                    I only read formatted code with indentation, so please use PRE tags for code snippets.


                                    I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).


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                                    • CPalliniC CPallini

                                      That is 0.

                                      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]

                                      H Offline
                                      H Offline
                                      hairy_hats
                                      wrote on last edited by
                                      #19

                                      Only in integer maths.

                                      1 Reply Last reply
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