Question
Find the mean proportion of 8.4 and 18.9.
Solution
Mean proportion of 'a' and 'b' = √ab So, required mean proportion = √(8.4 X 18.9) = √(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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