SSC CGL – Combined Graduate Level Examination · Question 58
A shop ordered 8 dozen type-A pens and some dozen type-B pens. Type-A costs 2.5 times type-B per dozen. When delivered, quantities were swapped and the bill increased by 50%. What was the original ratio of type-A to type-B?
Show answer & explanation
Answer: (B) 4:11
Explanation
2.5x + 8 = 1.5(20 + x) gives x = 22, so 8 : 22 = 4 : 11.