state gov Kolkata Police Constable Mock Test 2024 Quantitative Aptitude Ratio and Proportion Simple Ratios
The ratio between two numbers is 7 ∶ 9. If we add 12 to the first number and subtract 15 from the second number, the ratio becomes 11 ∶ 4. Find the first number.
1
14
2
27
3
21
4
18