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Math Help - Combinations, bad components

  1. #1
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    Combinations, bad components

    Problem: 2012-11-23 at 14:46.png

    Attempt: C^6_1 \cdot 0.05^1 \cdot 0.95^5

    Correct is: 0.2036
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  2. #2
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    Re: Combinations, bad components

    I honestly can't figure out how they got that answer.

    I think your attempt is correct.
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  3. #3
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    Re: Combinations, bad components

    Quote Originally Posted by jacob93 View Post
    Problem: 2012-11-23 at 14:46.png
    Attempt: C^6_1 \cdot 0.05^1 \cdot 0.95^5
    Correct is: 0.2036
    You did not bother to tell witch one you are trying to do.

    a) \binom{6}{0}(.05)^0(.95)^{6-0}

    b) \binom{6}{1}(.05)^1(.95)^{6-1}

    c) \sum\limits_{k = 2}^6 {\binom{6}{k}(.05)^k(.95)^{6-k}} or
    1-\left(\binom{6}{0}(.05)^0(.95)^{6-0}+\binom{6}{1}(.05)^1(.95)^{6-1}\right)
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  4. #4
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    Re: Combinations, bad components

    Tried b). Thanks both of you, now I know I'm right.
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  5. #5
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    Re: Combinations, bad components

    I honestly can't figure out how they got that answer.




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