Boy sells a book for Rs. 800 he gets a loss of 20 %, To gain 10%, what should be the SP?
Choose the correct choice from the following answers.
A) 1100 B) 450 C) 550 D) 590 E) 600

Rationale: cost price = 800 / 80 x 100 = 1000 to gain 10 % = 1000 x 10 / 100 = 100 sp = cp + gain = 1000 + 100 = 1100 answer : a
Answer: A