The movie "21"

Discussion in 'Off Topic' started by smknSRT8, Jul 17, 2008.

  1. smknSRT8

    smknSRT8 Zealot
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    Has anyone seen this movie?

    If so, there is a math problem in the beginning of the movie that is about a game show and three doors. two of the doors have goats behind them and the other has a car. the contestant chooses door #1. The host tells the contestant that behind door #3 and asks the contestest if he would like to switch his choice from 1 to 2. The contest (being the student in the class at MIT) says YES why wouldn't I!?! "Thats 66% chances, thanks for the 33%"

    Can anyone tell me the reason that this is?
    In the movie they talked about linear variation.

    Can iPhone solve this!?!? haha
     
  2. Youngbinks

    Youngbinks Zealot
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  3. connie

    connie Evangelist
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    I have not seen the movie, but I read the book, great read.
     
  4. Hayesimus

    Hayesimus Guest

    that's a load of crap. whether you say 2/3 or 1/2 it doesn't change the scenario... they made that WAY more complicated than necessary...
     
  5. Alexander

    Alexander Zealot
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    Solid argument Hayes, with that kind of logic you may have just gave Prof. Francois Bergeron and Steven R. Costenoble of Drexel University a run for their money. :rolleyes:
     
  6. smknSRT8

    smknSRT8 Zealot
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    I am confused? you have a 66% chance of winning the car if you switch after the host tells you what the "non-car" door is?
     
  7. Hayesimus

    Hayesimus Guest

    that's what I'm saying is more complicated than necessary. Regardless of how Manu doors you start out with, if you have to choose between tqlwo doors then your odds are 50/50. No way around it.
     
  8. smknSRT8

    smknSRT8 Zealot
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    i understand the problem, I was confused with what you said. I don't agree with 50/50 though because. Also, I know you know this but the guys are from MIT, they can most likely crunch number better than we can.

    If you don't believe it, then just play the game 100 times and if you switch after you find out the door where the "non-car" is, you will win 66% of the time.

    I didn't necessarily believe it at first but gave 40 or so tries at work and it was higher than i thought
     
  9. Hayesimus

    Hayesimus Guest

    I'm saying that it doesn't matter. It doesn't change the fact that between two choices there is a 50/50 chance. The 66% I'd when you include the door that was eliminated. Which is pointless. This whole scenario is pointless! Does this give us world peace? Does it put an end to hunger?! Does it give us MMS on the iPhone!?!?! :p
     
  10. styfle

    styfle Zealot
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  11. Hayesimus

    Hayesimus Guest

    that's what I was thinking. Chances and statistics are not the same. 66% is if you played the scenario multiple times. But if you only play it once then you only end up with a or b. So 50/50.
     

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