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    Question

    Find the mean proportion of 8.4 and 18.9.

    A 25.2 Correct Answer Incorrect Answer
    B 18.4 Correct Answer Incorrect Answer
    C 12.6 Correct Answer Incorrect Answer
    D 16.8 Correct Answer Incorrect Answer

    Solution

    Mean proportion of 'a' and 'b' = тИЪab So, required mean proportion = тИЪ(8.4 X 18.9) = тИЪ(7 X 4 X 0.3 X 7 X 0.3 X 3 X 3) = 7 X 2 X 3 X 0.3 = 12.6

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