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    phelpsfan08's Avatar
    phelpsfan08 Posts: 31, Reputation: 3
    Junior Member
    		  
    #1

    Jun 30, 2010, 02:57 PM
    Monty Hall Problem
    Okay. I probably won't understand this even after explained. I just watched the movie 21. The teacher gave the student a problem which I looked up and it is call the Monty Hall Problem. Game show contestant has 3 doors to choose from. Behind one door is a car. Behind the other two is a goat. Contestant chooses Door 1. Host knows what is where and opens Door 3 to reveal a goat. The movie said it is better to switch.
    I understand that people want to stay with Door 1 for psychological reasons. But why wouldn't it be a 50/50 chance?
    The only way that I can make sense of it is. When choosing Door 1 there was a 1/3 chance. The odds changed when the other door was opened. So why stay with the same door that had a 1/3 chance? Is this reasoning correct at all?
    Thanks in advance for your help.
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
    Ultra Member
    		  
    #2

    Jun 30, 2010, 03:43 PM

    If you looked it up, then you peobably seen this. This article explains the idea.

    Monty Hall problem - Wikipedia, the free encyclopedia
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