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    Question

    The mean proportional of 9 and 16 is

    _____.
    A 12 Correct Answer Incorrect Answer
    B 16 Correct Answer Incorrect Answer
    C 18 Correct Answer Incorrect Answer
    D 10 Correct Answer Incorrect Answer

    Solution

    We know that, Mean proportion of 'a' and 'b' = тИЪ(a ├Ч b)
    So, Mean proportion = тИЪ(9 ├Ч 16) = тИЪ144 = 12

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