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Have I worked out my overall grade percentage correctly..? Watch

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    I had 6 ten credit modules and 3 twenty credit modules.

    I added up the 10 credit module percentages: 78+46+58+68+72+50 = 372

    Then 372 / 6 = 62

    I added up the 20 credit module percentages: 59+60+61 = 180

    Then 180 / 3 = 60

    So I think these two percentages I’ve been left with are worth 50% each now?

    So I did (0.62 x 0.50) + (0.60 x 0.50) = 0.61 so I got 61% overall right?
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    I think so!
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    (Original post by rosie152)
    I had 6 ten credit modules and 3 twenty credit modules.

    I added up the 10 credit module percentages: 78+46+58+68+72+50 = 372

    Then 372 / 6 = 62

    I added up the 20 credit module percentages: 59+60+61 = 180

    Then 180 / 3 = 60

    So I think these two percentages I’ve been left with are worth 50% each now?

    So I did (0.62 x 0.50) + (0.60 x 0.50) = 0.61 so I got 61% overall right?
    This is correct, but only because six 10 credit modules have the same total value as three 20 credit modules.

    If you wanted a more general way of working stuff like this out, for say if you didn't have obvious 50:50 percentages...you could do (sum of[module credit*percentage attained in module])/(total module credits taken).

    I.e. in your case (( 78+46+58+68+72+50)x10 +( 59+60+61)*20)/(6x10 + 3x20)=61
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    I did it like this:

    You did 120 credits overall.
    (74+46+...)*(10/120)=31
    (59+60+51)*(20/120)=30
    Overall = 31+30 = 61

    Basically:
    Work out total number of credits
    Add up all scores of 10 credit modules. Multiply this number by 10/[total number of credits] = ....
    Add up all scores of 20 credit modules. Multiply this number by 20/[total number of credits] = ...
    Add up all scores of 30 credit modules. Multiply this number by 30/[total number of credits] = ...
    etc
    Then add all of the ... numbers up.

 
 
 
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