Multiple Choice Questions on If the average marks of 1 5th of class is 70 and 2 5th class is 45 and the average mark of rema........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

If the average marks of 1 5th of class is 70 and 2 5th class is 45 and the average mark of rema...........

Quantitative Aptitude ( CCS) Average
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    If the average marks of 1/5th  of class is 70% and 2/5th class is 45% and the average mark of remaining class is 60%, then the average % of the whole class is?

    73%

    Incorrect Answer

    45%

    Incorrect Answer

    62%

    Incorrect Answer

    56%

    Correct Answer
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    Explanation:

    Avg = 100*[x/5 *70/100 + 2x/5 * 45/100 +2x/5*60/100 ] /x
    = 70+90+20/5
    =56

    By: Sandeep Dubey
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