Exams › SSC CGL (Prelims) › General

Red, blue, and green balls are present in the ratio 2:3:5. If 15 red, 10 blue, and some unknown number of green balls are added so that the new ratio becomes 3:4:6, how many green balls were added?

1. 3
2. 5
3. 7
4. 0

Correct answer: 0

Solution

Let the original numbers be 2x, 3x, and 5x. After adding 15, 10, and g, the ratio becomes 3:4:6, so 2x+15=3k, 3x+10=4k, and 5x+g=6k. Solving gives x=15 and k=15, which makes g=0.

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