IBPS SO Prelims Exam Model Paper 10

Total price of 10 Fiction books = 10 × 400 = Rs.4000
Let the number of Comic books be N.
Total price of N comic books = N × 550 = Rs.550N
⇒ 4000 + 550N = 500 × (N + 10)
⇒ 4000 + 550N = 500N + 5000
⇒ N = 20
Number of Comic books = 20
∴ Required difference = 20 – 10 = 10