At a selling price of Tk. 275 a book yield 25% profit. What selling price will yield the profit of 10%?

At a selling price of Tk. 275 a book yield 25% profit. What selling price will yield the profit of 10%? Correct Answer 242

Let the actual price be A. Then,  A + 25% of A = 275 or,  A + 0.25A = 275 or,  1.25A = 275 or,  A = 275/1.25 = 220 TK. So, selling price at 10% profit = 220 + 10% of 220 = 220 + 22 = 242 TK
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