Results 1 to 3 of 3

Math Help - Help please

  1. #1
    Member
    Joined
    Jan 2008
    Posts
    118

    Help please

    I had a test today. Heres one of my questions. Can someone do it, because im not sure if I got it right, and I'd like to know now.

    You have two different dice. One die has a 1 and five 3's.
    The next die has four 2's and two 6's.

    Like this:

    Die 1- 133333
    Die 2- 222266

    Set up this table:
    X __ __ __ __
    p(X) __ __ __ __

    What is the mean?
    What is the standard deviation?

    For the X's, I put 3, 5, 7, 9
    Can someone do this so I can see if im right with everything? I'd really appreciate it! thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,386
    Thanks
    1476
    Awards
    1
    I am sorry but I am in a great hurry.
    So here is a brief help. There are still 36 elementary events.
    3 gotten in 4 ways
    5 gotten in 20 ways
    7 gotten in 2 ways
    9 gotten in 10 ways
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,664
    Thanks
    298
    Awards
    1
    Quote Originally Posted by Morgan82 View Post
    I had a test today. Heres one of my questions. Can someone do it, because im not sure if I got it right, and I'd like to know now.

    You have two different dice. One die has a 1 and five 3's.
    The next die has four 2's and two 6's.

    Like this:

    Die 1- 133333
    Die 2- 222266

    Set up this table:
    X __ __ __ __
    p(X) __ __ __ __

    What is the mean?
    What is the standard deviation?

    For the X's, I put 3, 5, 7, 9
    Can someone do this so I can see if im right with everything? I'd really appreciate it! thanks
    Please do not double post.

    Thread closed.

    -Dan
    Follow Math Help Forum on Facebook and Google+


/mathhelpforum @mathhelpforum