Results 1 to 5 of 5

Math Help - Binomial distribution.

  1. #1
    Newbie
    Joined
    Jun 2011
    Posts
    18

    Question Binomial distribution.

    At XYZ high school there is a 18% drop-out rate for seniors. If six seniors are randomly selected, what is the probability that one will drop out of high school?
    Last edited by mr fantastic; August 11th 2011 at 05:36 AM. Reason: Title.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Aug 2009
    Posts
    69

    Re: What is the probability [Help Please]

    Sounds like a binomial question to me.

    P(1) = 6C1 (0.18)^1(1-0.18)^(6-1)
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jun 2011
    Posts
    18

    Re: What is the probability [Help Please]

    Can it be like this:
    E = np
    1 = 6 x p
    p = 1/6
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Aug 2009
    Posts
    69

    Re: What is the probability [Help Please]

    No, that is the expected value of how many students out of 6 will drop out, which will be

    np = 6 x 0.18 = 1.08, you are after the probability of 1 student dropping out when there are 6 students.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Jun 2011
    Posts
    18

    Re: Binomial distribution.

    Thank you...got it....
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: March 21st 2010, 05:25 PM
  2. Replies: 1
    Last Post: November 12th 2009, 12:38 AM
  3. Binomial distribution
    Posted in the Statistics Forum
    Replies: 4
    Last Post: May 7th 2009, 12:29 AM
  4. Replies: 1
    Last Post: March 11th 2009, 11:09 PM
  5. Cumulative distribution function of binomial distribution
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: October 31st 2008, 03:34 PM

Search Tags


/mathhelpforum @mathhelpforum