Posers and Puzzles

Posers and Puzzles

  1. Standard membercelticcountry
    Copyright ©2001-2006
    Eastbourne
    Joined
    20 Sep '04
    Moves
    16434
    02 Feb '06 18:361 edit
    RHP CHOSE Cup 'A' .

    STAGE 2 OF Puzzle

    I now raise cup 'B' to show the ball isnt underneath that cup.(bear in mind I actuall know which cup has the ball)


    You now have a second chance to choose where tha ball is hidded.

    You are allowed to change your mind.But you dont have to.

    Do you stick with cup 'A' or switch to cup 'C' ?

    Stay with 'A' or switch to 'C'.
  2. Standard memberPBE6
    Bananarama
    False berry
    Joined
    14 Feb '04
    Moves
    28719
    02 Feb '06 18:57
    Originally posted by celticcountry
    RHP CHOSE Cup 'A' .

    STAGE 2 OF Puzzle

    I now raise cup 'B' to show the ball isnt underneath that cup.(bear in mind I actuall know which cup has the ball)


    You now have a second chance to choose where tha ball is hidded.

    You are allowed to change your mind.But you dont have to.

    Do you stick with cup 'A' or switch to cup 'C' ?

    Stay with 'A' or switch to 'C'.
    Switch to C. The odds are 2/3 that the ball is under cup C, and only 1/3 that you picked right in the first place and it's under cup A.

    Let's make a deal!
  3. SubscriberBigDoggProblem
    Just...the Dogg
    bigdogghouse.com/RHP
    Joined
    26 Nov '04
    Moves
    123828
    02 Feb '06 19:47
    http://mathforum.org/dr.math/faq/faq.monty.hall.html
  4. Standard membercelticcountry
    Copyright ©2001-2006
    Eastbourne
    Joined
    20 Sep '04
    Moves
    16434
    02 Feb '06 19:50
    Originally posted by BigDoggProblem
    http://mathforum.org/dr.math/faq/faq.monty.hall.html
    lol


    ok.

    Game over.
  5. Joined
    01 May '05
    Moves
    390
    02 Feb '06 23:55
    Originally posted by celticcountry
    lol


    ok.

    Game over.
    Everyone knew it was a Monty Hall. Why didn1t you post the whole thing or didn't post at all?

    Like I said, you must assume that:
    a)It is part of the rules that you must lift one cup.
    b)You won't lift the cup with the ball.
  6. Standard membercelticcountry
    Copyright ©2001-2006
    Eastbourne
    Joined
    20 Sep '04
    Moves
    16434
    03 Feb '06 09:27
    Originally posted by fetofs
    Everyone knew it was a Monty Hall. Why didn1t you post the whole thing or didn't post at all?

    Like I said, you must assume that:
    a)It is part of the rules that you must lift one cup.
    b)You won't lift the cup with the ball.
    i didnt realize it was a well know one.
  7. Standard memberTheMaster37
    Kupikupopo!
    Out of my mind
    Joined
    25 Oct '02
    Moves
    20443
    05 Feb '06 13:17
    Originally posted by celticcountry
    i didnt realize it was a well know one.
    It kept mathematicians busy for several years...
  8. Standard memberBowmann
    Non-Subscriber
    RHP IQ
    Joined
    17 Mar '05
    Moves
    1345
    05 Feb '06 14:39
    Originally posted by TheMaster37
    It kept mathematicians busy for several years...
    Half of them got it wrong.
  9. Standard membersonhouse
    Fast and Curious
    slatington, pa, usa
    Joined
    28 Dec '04
    Moves
    52874
    05 Feb '06 15:31
    Originally posted by Bowmann
    Half of them got it wrong.
    Here is a Java animation of the problem, I tried it, if you switch
    you really do win more often.
    http://people.hofstra.edu/staff/steven_r_costenoble/MontyHall/MontyHallSim.html
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