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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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