railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Quantitative Aptitude Ratio and Proportion Mean Proportional
If x is subtracted from each of 52, 47, 20 and 19, the numbers so obtained in this order are in proportion. What is the mean proportional between (x + 4) and (x - 8)?
1
9
2
12
3
8
4
10