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    3. Quantitative Aptitude
    4. Ratio and proportion
    5. The mean proportional of 10 and 40 is _____.

    Question

    The mean proportional of 10 and 40 is

    _____.
    A 14 Correct Answer Incorrect Answer
    B 26 Correct Answer Incorrect Answer
    C 20 Correct Answer Incorrect Answer
    D 24 Correct Answer Incorrect Answer

    Solution

    We know that, Mean proportion of 'a' and 'b' = √(a × b)
    So, Mean proportion = √(10 × 40) = √400 = 20

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