state gov UP Police Head Operator (Radio Cadre) Mock Test Quantitative Aptitude Ratio and Proportion Simple Ratios
A certain number is added to each of a pair of numbers which are in the ratio 4 ∶ 5. The sum of the resulting numbers is 39 and their ratio (taken in the same order as mentioned above) is 6 ∶ 7. What is the number added?
1
6
2
7
3
8
4
9