Exams › SSC CGL (Prelims) › General

A box has 120 pencils in red, blue, and black in the ratio 2:3:5. If 10 red and 20 black pencils are removed, what is the new ratio of red to black pencils?

1. 1:2
2. 3:5
3. 13:15
4. 7:20

Correct answer: 7:20

Solution

The total ratio parts are 2+3+5=10, so each part is 120/10=12. Thus red = 24 and black = 60. After removal, red = 14 and black = 40, giving the ratio 14:40 = 7:20.

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