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Math Help - What am I doing wrong here?

  1. #1
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    What am I doing wrong here?

    I've attached a PDF of the problem worked out by my professor. I still cannot figure out, even with the work shown, what I am doing wrong. It's sort of sad and I'm losing my mind here lol

    Where it says P(X=4)=C(6,4)(.6)^4(.4)6-4
    I'm putting this into the calculator as:
    (.6)^4 x (.4)^2 and am NOT getting .311

    What am I doing wrong?

    Thanks guys...!
    Attached Thumbnails Attached Thumbnails What am I doing wrong here?-arghwtf.jpg  
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  2. #2
    MHF Contributor matheagle's Avatar
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    I have no idea what you're doing
    6 choose 4 is 15
    My advice is to do it by 'hand', less calculator
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  3. #3
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    I know, it's written out next to the equation...why am I not getting that? How did you put it into the calculator?
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  4. #4
    MHF Contributor matheagle's Avatar
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    15 times (.6)^4 times (.4)^2
    are you leaving out the 15???
    You don't show any work, so I cannot give you any partial credit,
    same story as in my class
    Last edited by matheagle; May 3rd 2009 at 04:01 PM.
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  5. #5
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    Wowww...I totally forgot to get 6!/4! x 2

    I just went straight to the (.6)^4 x (.4)^2

    Thank you so much. I'm studying for a final so it's been a while since I've looked at this stuff...

    thanks again
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