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Math Help - Weighted means

  1. #1
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    Weighted means

    Hello

    I having difficulty with this maths question I attempted many times. The book doesn't show an example on how to work out or explain it.
    Here is the question:

    Q.4

    The final percentage mark in course comes from a project mark and an examination mark with the examination mark carrying twice the weight of the project mark. Find the final percentage marks for the following students whose project and examination marks shown below(it suppose to be a table)

    Student: Annie Bunty Connie Dianne

    Project mark (%) 72 61 77 68
    Examination mark (%) 63 58 62 68


    Does this have a particular formula?
    I think the mark is multiplyed by the weight.
    Thank you for any help provided.
    Last edited by atom360; February 16th 2009 at 03:47 PM.
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  2. #2
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    Quote Originally Posted by atom360 View Post
    Hello

    I having difficulty with this maths question I attempted many times. The book doesn't show an example on how to work out or explain it.
    Here is the question:

    Q.4

    The final percentage mark in course comes from a project mark and an examination mark with the examination mark carrying twice the weight of the project mark. Find the final percentage marks for the following students whose project and examination marks shown below(it suppose to be a table)

    Student: Annie Bunty Connie Dianne

    Project mark (%) 72 61 77 68
    Examination mark (%) 63 58 62 68


    Does this have a particular formula?
    I think the mark is multiplyed by the weight.
    Thank you for any help provided.
    Since, project marks have single weightage,and examination marks have twice weightage,

    so, for Annie, final marks = \frac{1\times 72+2\times 63}{1+2}=66

    for Bunty, final marks = \frac{1\times 61+2\times 58}{1+2}=59

    In the same way, calculate the same for rest of the students.
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  3. #3
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    Feb 2009
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    weighted mean

    Thank you very much I really appreciate it.
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