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Homework Help: Probabilty distribution?

  1. May 27, 2009 #1
    1. The problem statement, all variables and given/known data

    It is known that 40% of the adults support the idea of constructing a second International Airport for the country .A sample of 15 adults was questioned regarding this issue .
    what is the probability of that no more that 6 in the sample support the idea ?

    3. The attempt at a solution

    I just want to know is this a binomial distribution where
    n=15 and

    if so the answer should be
    SIGMA( r goes 0 to 6 )15Cr * 0.4^(r) * 0.6^(r)

    am i correct ??/if I'm wrong please help me out !!!!!!Or if I'm' write confirm it thanks a lot!!!!!!!!!
  2. jcsd
  3. May 27, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hi rclakmal! :smile:

    (try using the X2 tag just above the Reply box :wink:)

    Yes, that's fine. :smile:
  4. May 27, 2009 #3
    thanks Tiny TIm !!:
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