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      Question

      The mean proportional of 5 and 45 is

      _____.
      A 11 Correct Answer Incorrect Answer
      B 17 Correct Answer Incorrect Answer
      C 15 Correct Answer Incorrect Answer
      D 19 Correct Answer Incorrect Answer

      Solution

      We know that, Mean proportion of 'a' and 'b' = √(a × b)
      So, Mean proportion = √(5 × 45) = √225 = 15

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