SSC CGL – Combined Graduate Level Examination · Question 61
A bookstore ordered 10 boxes of hardcover books and some boxes of paperback books. Hardcovers cost twice as much per box as paperbacks. Due to an order error, the quantities were swapped, increasing the bill by 20%. What is the ratio of hardcover to paperback boxes originally?
Show answer & explanation
Answer: (A) 4:7
Explanation
2x + 10 = 1.2(20 + x) gives x = 17.5, so 10 : 17.5 = 4 : 7.