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Quantitative Aptitude
Ratio and proportion
The mean proportional of 10 and 40 is _____.

Question

The mean proportional of 10 and 40 is

_____.

A 14 Correct Answer Incorrect Answer

B 26 Correct Answer Incorrect Answer

C 20 Correct Answer Incorrect Answer

D 24 Correct Answer Incorrect Answer

Solution

We know that, Mean proportion of 'a' and 'b' = √(a × b)
So, Mean proportion = √(10 × 40) = √400 = 20

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