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Thread: Working out a percentage: What grade do I need in the second part?

  1. #1

    Working out a percentage: What grade do I need in the second part?

    I am currently trying to work out pass percentages for my course work at university

    The course work consists of 2 different pieces of work that are marked separately
    the first course work piece is worth 20% and the second is worth 80%.

    In the first coursework I got 17% out of the possible 20%

    The second course work is marked in two parts
    The first part is out of 22- of which I got 12
    The second part is out of 30 - which I havenít received a mark for yet

    What mark do I need to get in the second part of the second course work to get an overall
    mark of 50% for both course works combined?


    Any help would be appreciated

  2. #2
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    Quote Originally Posted by Callum Buttery View Post
    I am currently trying to work out pass percentages for my course work at university

    The course work consists of 2 different pieces of work that are marked separately
    the first course work piece is worth 20% and the second is worth 80%.

    In the first coursework I got 17% out of the possible 20%

    The second course work is marked in two parts
    The first part is out of 22- of which I got 12
    The second part is out of 30 - which I havenít received a mark for yet

    What mark do I need to get in the second part of the second course work to get an overall
    mark of 50% for both course works combined?


    Any help would be appreciated
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  3. #3
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    Quote Originally Posted by Callum Buttery View Post
    I am currently trying to work out pass percentages for my course work at university

    The course work consists of 2 different pieces of work that are marked separately
    the first course work piece is worth 20% and the second is worth 80%.

    In the first coursework I got 17% out of the possible 20%

    The second course work is marked in two parts
    The first part is out of 22- of which I got 12
    The second part is out of 30 - which I havenít received a mark for yet

    What mark do I need to get in the second part of the second course work to get an overall
    mark of 50% for both course works combined?


    Any help would be appreciated
    .5=.2(17/20)+.8(.5)(12/22+x/80)
    solve for x

    the .5 is because you have to average the 2 parts of the second course

  4. #4
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    Quote Originally Posted by sinx View Post
    .5=.2(17/20)+.8(.5)(12/22+x/80)
    solve for x

    the .5 is because you have to average the 2 parts of the second course
    Where did the 80 come from? Why average the 2 parts. You might be right, but this was not given.
    I feel it should be .5 = .2(17/20)+.8((22+x)/52) where x is the number of points you got on part 2 of the 2nd exam. I got 52 from there being 22+30 points on the 2nd part. I got 22+x from getting 22 points and then x points.

    You ask what grade you need on the 2nd part of exam 2 to get 50% overall. Depending on what form you want your answer in, it will be either x/30 or (100x/30)%.

    I suspect that you will not mind if you get over 50%. So to do this you should solve for .2(17/20)+.8((22+x)/52) [tex]\ge[/tex].5
    Last edited by Jomo; 12-07-2018 at 01:13 AM.
    A mathematician is a blind man in a dark room looking for a black cat which isnít there. - Charles R. Darwin

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