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Excel 2007 : sum of divided columns with letters and numbers

  1. #1
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    sum of divided columns with letters and numbers

    I am using excel for monitoring students marks in science.
    What I am trying to do (with no excel training) is link columns and rows to generate an overall mark. eg:
    10 15 20 total
    a 3 0 #VALUE!

    a-means the student was absent and the score out od 10 should not be applied.
    3 is the score out of 15 and
    0 is the score out of 20

    the following is as far as I have gotten
    =SUM(IF(ISTEXT(A2),"""",IF(A2="0",0,IF(A2>0,A2/A1,))),IF(ISTEXT(B2),"",IF(B2="0",0,IF(B2>0,B2/B1,))),IF(ISTEXT(C2),"",IF(C2="0",0,IF(C2>0,C2/C1,))))

    I have stuffed up somewhere but I have no idea where. Any help is greatly appreciated.

    chook
    Last edited by chook; 11-20-2011 at 07:47 AM.

  2. #2
    Forum Guru (RIP) Marcol's Avatar
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    Re: sum of divided columns with letters and numbers

    Try
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    [EDIT]
    Sorry wasn't thinking this is easier
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    and to handle errors, this will return "a" if the student is absent from all tests
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    Last edited by Marcol; 11-20-2011 at 08:13 AM.
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  3. #3
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    Re: sum of divided columns with letters and numbers

    Thanks, will try in the morning
    chook

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