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Math Help - Help

  1. #1
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    "Of three urns, the first contains 2 white and 4 black cards, the second contains 8 white and four black cards, and the third contains 1 white and 3 black card. If one card is selected from each urn, find the probability that exactly 2 white cards are drawn"
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  2. #2
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    You have three cases to calculate and add up.
    Here is one: P\left( {W_1 W_2 B_3 } \right) = \frac{2}{6} \cdot \frac{8}{{12}} \cdot \frac{3}{4}.

    You do the other two cases.
    Don't forget to add them up.
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  3. #3
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    Thank you Plato but could you show me the other two cases
    Last edited by Infiniti; October 22nd 2007 at 04:57 PM.
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  4. #4
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    Quote Originally Posted by Infiniti View Post
    Could you show me the other two cases?
    No. I will not do your work for you.
    I will be glad to help you!
    What have you done on this problem.
    Take what I did for you, then apply it to the other two cases.
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  5. #5
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    Thanks for all your help Plato! I finally got it.
    Its just that my teacher comes in the class and gives us the paperwork without any explanation. His other DataManagement class has an average of 57% and our class is at 62%. Thank you
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  6. #6
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    Quote Originally Posted by Infiniti View Post
    His other DataManagement class has an average of 57% and our class is at 62%.
    That sound like my foundations class at mid-term! But this week I had 30% drop from that class. Given the drops, the class average went up 20%.
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