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Math Help - marbles

  1. #1
    Junior Member
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    Jun 2006
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    59

    marbles

    A bag contains 3 reds, 4 white, and 5 blue marbles. Jason begtins removing marbles from the bag at random, one at a time. Wht is the least number of marbles he must remove to be sure tht he has at least 1 marble of each color?

    Ans is 10.
    I knew how to get 10, but now I forgot it.
    Could you help me please?
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  2. #2
    Member Glaysher's Avatar
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    Quote Originally Posted by Judi View Post
    A bag contains 3 reds, 4 white, and 5 blue marbles. Jason begtins removing marbles from the bag at random, one at a time. Wht is the least number of marbles he must remove to be sure tht he has at least 1 marble of each color?

    Ans is 10.
    I knew how to get 10, but now I forgot it.
    Could you help me please?
    Worst case scenario

    Takes all 5 blue then all 4 white then 1 red

    10 marbles altogether
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