A bookseller sells his book at a profit of 20 percent after offering a discount of 10 percent on the marked price. He increases his marked price by Rs 150. After providing the same discount his profit percentage increases to 40 percent. Find the purchase price of the book?
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1200
Step-by-step explanation:
20/100×150. =20×15/10
=300/10
=30×40
1200