railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Ratio and Proportion Simple Ratios
In a bag, the ratio of red balls and green balls is 3 : 8. If 12 green balls are put to the bag, the ratio of red balls and green balls would become 1 : 4. How many red balls are there in the bag?
1
8
2
9
3
12
4
10