Results 1 to 3 of 3

Math Help - secetary periodically checks, check answer please

  1. #1
    Member
    Joined
    Jun 2006
    Posts
    165

    Question secetary periodically checks, check answer please

    A secretary periodically checks to see how many of the three lines into the office are busy. Her findings for one week were the following.

    No. lines busy Frequency
    0 20
    1 65
    2 25
    3 10

    Let the random variable X be the number of lines busy. Find the probability distribution of X.

    My answer is.

    X P(X)

    0 0.20
    1 0.65
    2 0.25
    3 0.10

    Thanks for checking my answer.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by kwtolley
    A secretary periodically checks to see how many of the three lines into the office are busy. Her findings for one week were the following.

    No. lines busy Frequency
    0 20
    1 65
    2 25
    3 10

    Let the random variable X be the number of lines busy. Find the probability distribution of X.

    My answer is.

    X P(X)

    0 0.20
    1 0.65
    2 0.25
    3 0.10

    Thanks for checking my answer.
    She checked 120 times, so the relative frequencies (which are our estimate
    of the probabilities) are 20/120, 65/120, .. and so on.

    RonL
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Jun 2006
    Posts
    165

    thnaks

    thank you for checking, I wanted to make sure what I did was right.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. help me check the answer
    Posted in the Differential Geometry Forum
    Replies: 2
    Last Post: April 7th 2010, 06:08 AM
  2. Hi - -- I want check my answer
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: October 13th 2009, 07:08 AM
  3. Please Check My Answer.
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: June 14th 2008, 11:30 PM
  4. Answer Checks!!
    Posted in the Algebra Forum
    Replies: 5
    Last Post: February 13th 2008, 05:59 AM
  5. Answer Check
    Posted in the Algebra Forum
    Replies: 3
    Last Post: January 27th 2008, 01:58 AM

Search Tags


/mathhelpforum @mathhelpforum