state gov Allahabad High Court Stenographer 2024 Mock Test Series Quantitative Aptitude Ratio and Proportion Mean Proportional
The mean proportional of 8a2 and \(\frac{18}{a^4}\), where a is a positive number, is _____.
1
\(\frac{12}{a^2}\)
2
12a
3
\(12a^2\)
4
\(\frac{12}{a}\)