Boy sells a book for Rs. 450 he gets a loss of 10 %, To gain 10 %, what should be the SP?  Choose the correct choice from the following options.
A) Rs.330
B) Rs.430
C) Rs.550
D) Rs.600
E) Rs.620
Find Selling Price to gain 10 %.   Now, we are asked to find selling price to gain 10% profit.   Hint:   Selling Price = (100 + Gain%) × C.P.   100   Selling Price = (100 + 10) × 500   100   Selling Price = (110) × 500   100   Therefore, selling Price = Rs.550   Rs.550
<result>C</result>
Boy sells a book for Rs. 450 he gets a loss of 10 %, To gain 10 %, what should be the SP?