A bookseller bought 500 text books for ₹ 20,000. He wanted to sell them at a profit so that he get 50 books free. At what profit percent should he sell them?
Cost price of 500 text books = Rs. 20,000
=> Cost price of 50 books = $$\frac{20,000}{500} \times 50=Rs.$$ $$2,000$$
To get 50 books free,
=> Selling price of 500 books = $$Rs.$$ $$(20,000+2,000)=Rs.$$ $$22,000$$
$$\therefore$$ Profit % = $$\frac{22,000-20,000}{20,000} \times 100$$
= $$\frac{2000}{200}=10\%$$
=> Ans - (A)
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