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

    Jun 1, 2007, 07:36 PM
    Calculating Probabilities using area model
    Two identical containers contain marbles. Container 1 has 2 white marbles and one red marble. Contanier 2 has one white marble and one red marble. Suppose you select a container at random and then draw out a marble. What is the probability of drawing a white marble?

    For my answer I got 2 out of 6. Is that answer right?
    jstrike's Avatar
    jstrike Posts: 418, Reputation: 44
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    #2

    Jun 1, 2007, 09:00 PM
    Quote Originally Posted by prettyinpinkgirl
    For my answer I got 2 out of 6. Is that answer right?
    There's a 66.67% chance of drawing a white marble from container 1.
    There's a 50% chance of drawing a while marble from container 2.
    Your answer is 30% which is less than either of those... you might want to double check your work.
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