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statistics

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refer to a bag of marbles containing 5 green marbles, 4 red marbles and 2 yellow marbles. Three marbles are drawn from the bag, without replacement. What is the probabilty that all three marbles drawn are green?

  • statistics - ,

    11 marbles, 5 green
    probability that #1 is green = 5/11

    now 10 marbles, 4 green
    probability that #2 is green = 4/10

    now 9 marbles, 3 green
    probability that #3 is green = 3/9

    so
    5/11 * 2/5 * 1/3
    = 2/33

  • statistics - ,

    thanks what is the probability that at least one of the marbles drawn is green? I thinks it's 1/11 but not sure.


    Then what is the probability that only one of the marbles drawn are green?

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