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    Jules89's Avatar
    Jules89 Posts: 2, Reputation: 1
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    #1

    Nov 9, 2008, 08:07 PM
    probability without replacement
    Given: 40 blue marbles, 40 red marbles, 20 green marbles
    60 are big

    If 3 marbles are chosen at random without replacement what is the probability of choosing 3 big blue marbles?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Nov 10, 2008, 11:44 AM

    The problem here is that we don't know how many big blue marbles there are in the first place. Do they give you any other data, such as telling you that the big marbles are randomly distributed among the 3 colors? Otherwise it is impossible to give an answer to this question. Please type out the question exactly as it is written in your homework assignment - don't paraphrase.
    Jules89's Avatar
    Jules89 Posts: 2, Reputation: 1
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    #3

    Nov 17, 2008, 07:34 PM
    It is a study guide question and that is the way it was worded and the at is what was confusing me. I wasn't sure if I was supposed to take 60 percent of each or what, but thank you.
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