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Thread: Probability

  1. #1 Probability 
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    Can someone please solve this Q:
    a bag contains 6 red and 4 green marbles.To drawing of three marbles:
    1) replacement
    2)without replacement
    What is the probability of first three marbles are red and the next three are 1 red and 2 Green


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  3. #2  
    Forum Professor jrmonroe's Avatar
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    We're not here to solve problems, but we give hints to help you along. What have you figured out so far?


    Grief is the price we pay for love. (CM Parkes) Our postillion has been struck by lightning. (Unknown) War is always the choice of the chosen who will not have to fight. (Bono) The years tell much what the days never knew. (RW Emerson) Reality is not always probable, or likely. (JL Borges)
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  4. #3  
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    1) first three marbles are red:
    6/10+6/10+6/10=9/5
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  5. #4  
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    I try to answer ... . I’m sorry if I wrong ... .

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  6. #5  
    Genius Duck Moderator Dywyddyr's Avatar
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    Quote Originally Posted by cmab View Post
    1) first three marbles are red:
    6/10+6/10+6/10=9/5
    Intriguing.
    I wonder how it's possible to get a probability higher than 1.
    Maybe, just maybe, if we substitute a "x" for the "+" it might yield a more accurate answer = 0.216.
    Last edited by Dywyddyr; March 4th, 2013 at 04:28 PM.
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  7. #6  
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    without replacement6/10,5/9,4/8,3/7,4/6,3/5 (4green2red)with replacement6/10,6/10,6/10,6/10,4/10,4/10
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  8. #7  
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    thanx fiveworlds!!!!
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