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    Question

    Find the mean proportion of 81 and

    324.
    A 162 Correct Answer Incorrect Answer
    B 124 Correct Answer Incorrect Answer
    C 144 Correct Answer Incorrect Answer
    D 118 Correct Answer Incorrect Answer

    Solution

    Mean proportion of 'a' and 'b' = √ab

    So, mean proportion = √(81 x 324) = √26244 = 162

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