Results 1 to 3 of 3

Math Help - tree diagram help.

  1. #1
    Newbie
    Joined
    Nov 2009
    Posts
    17

    tree diagram help.

    hi i am puzzled with this and i know its actually or should be straight forward.
    here is my question:
    employees of a company fall into 4 categories:
    managers 4%, adminstrators 12% Technicians 26% Labourers 58%

    If 20% of the managers, 5% of the administrators, 3% of the technicians and 0.5% of the labourers have the opportunity of promotion in the next year
    i. Construct a tree diagram
    ii. What is the probability that a randomly chosen employee is a manager and will gain promotion next year.
    Any pointers appreciated to get me started.
    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member

    Joined
    May 2006
    From
    Lexington, MA (USA)
    Posts
    11,735
    Thanks
    642
    Hello, ads114!


    Employees of a company fall into 4 categories:
    Managers 4%, Adminstrators 12%, Technicians 26%, Laborers 58%

    20% of the Managers, 5% of the Administrators, 3% of the Technicians and
    0.5% of the Laborers have the opportunity of promotion in the next year.

    (a) Construct a tree diagram
    Let M,A,T,L represent the four categories.

    Let P mean "Promoted" and N mean "Not promoted".
    Code:
                                                20%
                                            * - - - - * P
                        4%       ---        | 
                  * - - - - - - | M | - - - *
                  |              ---        |   80%
                  |                         * - - - - * N 
                  |
                  |                              5%
                  |                         * - - - - * P
                  |    12%       ---        | 
                  * - - - - - - | A | - - - *
                  |              ---        |   95%
                  |                         * - - - - * N
          o - - - *
                  |                              3% 
                  |                         * - - - - * P
                  |    26%       ---        |
                  * - - - - - - | T | - - - * 
                  |              ---        |   97%
                  |                         * - - - - * N
                  |
                  |                            0.5%
                  |                         * - - - - * P 
                  |    58%       ---        |
                  * - - - - - - | L | - - - *
                                 ---        |  99.5% 
                                            * - - - - * N
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Nov 2009
    Posts
    17

    tree diagram

    many thanks again i had managed to work out the diagram myself. i knew it was quite straight forward! i shall have a look at the questions i need answered i'm assuming i now get these done via my diagram!

    thankyou.

    ps standby!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. tree diagram (i think)
    Posted in the Statistics Forum
    Replies: 1
    Last Post: April 30th 2010, 11:45 AM
  2. tree diagram
    Posted in the Statistics Forum
    Replies: 1
    Last Post: April 30th 2010, 06:59 AM
  3. tree diagram
    Posted in the Statistics Forum
    Replies: 1
    Last Post: March 8th 2010, 09:03 AM
  4. Tree diagram...
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: February 14th 2008, 04:01 PM
  5. Tree Diagram Help
    Posted in the Advanced Statistics Forum
    Replies: 7
    Last Post: April 26th 2007, 03:28 PM

Search Tags


/mathhelpforum @mathhelpforum