RRB ALP CBT I Exam 14-Aug-2018 Shift 1 Solved Paper

Question : 52 of 75

Marks: +1, -0

In a bag the ratio of red balls to green balls is 4 ∶ 9. If 6 more green balls were added to the bag, the ratio of red balls to green balls would become 1 ∶ 3. How many red balls are there in the bag?