Multiple Choice Questions on The average marks in Science subject of a class of 20 students is 68 If the marks of two students we........... for Punjab Patwari Exam Preparation

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Multiple Choice Questions

The average marks in Science subject of a class of 20 students is 68 If the marks of two students we...........

Quantitative Aptitude (Pb Patwari) Average
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    The average marks in Science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively, then what would be the correct average?

    68.5

    Incorrect Answer

    69

    Correct Answer

    69.5

    Incorrect Answer

    70

    Incorrect Answer
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    Explanation:

    Difference of marks
    = 72 + 61 – 48 – 65 = 20
    ∴ Correct average marks
    = 68 + 20/20 = 69

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