1. 01-30-12 07:21 PM #1
    JohnGalt2341
    46 and 2 are just ahead of me
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    Probability Scenario...

    Lets say there are 100 marbles in a duffle bag. Some of them are Red and some of them are Blue. Your job is to figure out how many Red ones there are and how many Blue ones there are. The rules are... without looking in the bag you have to pick out 1 marble at a time. Write down its color and then put the marble back in the bag. Shake the bag up... repeat. How many times would you have to pick a marble out of the bag before you think could guess the correct number of Red and Blue marbles within 5? All guesses and or formulas are welcome.
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  2. 01-30-12 07:35 PM #2
    FourLengthsClear
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    Question is worded too vaguely. You would have to define the degree of certainty (confidence interval) you require the "guess" to have.
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  3. 01-30-12 07:37 PM #3
    JohnGalt2341
    46 and 2 are just ahead of me
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    Quote Originally Posted by FourLengthsClear View Post
    Question is worded too vaguely. You would have to define the degree of certainty (confidence interval) you require the "guess" to have.
    95%
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  4. 01-30-12 07:38 PM #4
    trytrytry
    All I do is trytrytry
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    easy 33
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  5. 01-30-12 07:41 PM #5
    Living The Dream
    Looks like an Underdog Week 2!
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    I would say that you have to pick 90 marbles out to come within an accurately guess of 5. You have no clue what's in the bag and I can't see any formula for predicting what's in a bag.
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  6. 01-30-12 07:50 PM #6
    The Hot Pepper
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    the problem here is that you need to factor in an equation of 3 variables which is kinda hard lol.


    Solution here -> http://www.mathwarehouse.com/algebra...-equations.php
    Last edited by The Hot Pepper; 01-30-12 at 07:54 PM.
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  7. 01-30-12 07:55 PM #7
    JohnGalt2341
    46 and 2 are just ahead of me
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    Quote Originally Posted by trytrytry View Post
    easy 33
    Just curious... how did you come up with 33?
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