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Math Help - A (simple) question on probability that has become confusing

  1. #1
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    A (simple) question on probability that has become confusing

    Hi all. This question is in a chapter that involves permutations and combinations and I'm a little thrown by it. I can't work out the answer to c)

    i have the following for:
    a) 0.50
    b) 0.25
    c)????

    I think c) is just 0.25 as well...but have a feeling I'm wrong...or could have a/b. wrong as well! please help! there are no answers in the back of the book.

    many thanks!
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  2. #2
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    Re: A (simple) question on probability that has become confusing

    Quote Originally Posted by flashylightsmeow View Post
    Hi all. This question is in a chapter that involves permutations and combinations and I'm a little thrown by it. I can't work out the answer to c)
    i have the following for:
    a) 0.50
    b) 0.25
    c)????
    I think c) is just 0.25 as well...but have a feeling I'm wrong...or could have a/b. wrong as well! please help! there are no answers in the back of the book.

    Is it true that B\subset A~?
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  3. #3
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    Re: A (simple) question on probability that has become confusing

    yes
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  4. #4
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    Re: A (simple) question on probability that has become confusing

    so...does that mean the answer is 0.25?
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  5. #5
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    Re: A (simple) question on probability that has become confusing

    Quote Originally Posted by flashylightsmeow View Post
    so...does that mean the answer is 0.25?

    Well A\cap B=B. So yes.
    However, I do find the wording of the question some what odd.
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  6. #6
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    Re: A (simple) question on probability that has become confusing

    Agh I know, It's from Paul Newbold and William Carlson's Statistics for Business and Economics...load of absolute cr*p! riddles with mistakes. Thank you very much Plato! No doubt there will be more posts like this in the future!
    Last edited by flashylightsmeow; March 27th 2013 at 09:38 AM.
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