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Math Help - probabilities

  1. #1
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    probabilities

    Five different CD-ROM games, Garble, Trapster, Zoom, Bungie, and Blast Em are offered as a promotion by Sugar Rush cereals. One game is randomly included with each box of cereal.
    a) Determine the probability of getting all 5 games if 12 boxes are purchased.
    b) explain the steps in your solution.
    c) discuss any assumptions that you make in your analysis


    I tried several different things for this q, but I didn't get the answer in the textbook for any of them. Their answer is 33/182.

    (1/5)^12

    1/5 x 1/4 x 1/3 x 1/2 x 1/1

    I think this problem is a dependent event
    Last edited by john-1; December 11th 2009 at 01:15 PM.
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  2. #2
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    Quote Originally Posted by john-1 View Post
    Five different CD-ROM games, Garble, Trapster, Zoom, Bungie, and Blast Em are offered as a promotion by Sugar Rush cereals. One game is randomly included with each box of cereal.
    a) Determine the probability of getting all 5 games if 12 boxes are purchased.
    b) explain the steps in your solution.
    c) discuss any assumptions that you make in your analysis


    I tried several different things for this q, but I didn't get the answer in the textbook for any of them. Their answer is 33/182.

    (1/5)^12

    1/5 x 1/4 x 1/3 x 1/2 x 1/1

    I think this problem is a dependent event
    Read this: Coupon collector's problem - Wikipedia, the free encyclopedia
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  3. #3
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    ok? I don't understand the connection..
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  4. #4
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    ok, so I tried something like this:

    5/12 x 4/11 x 3/10 x 2/9 x 1/8

    am I way off, or somewhere on the right track thinking..??
    I have thought about this for a long time now and I still can't seem to get the answer they have in the textbook.. anyone know how they got it?
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