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Problem: The printed price of a book is Rs 720 . After giving 10 % discount to the customer on the printed price, the book-seller gets 20 % profit. Find the purchase price for the book-seller. [ Calculator, Method and examples ]

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Your problem -> The printed price of a book is Rs 720 . After giving 10 % discount to the customer on the printed price, the book-seller gets 20 % profit. Find the purchase price for the book-seller.

The printed price of a book is Rs 720.

After giving 10 % discount to the customer on the printed price

S.P. = Printed price - discount = 100 - 10 = 90

 Printed Price S.P. 100 90 720 ?

the book-seller gets 20 % profit,

S.P. = C.P. + Profit = 100 + 20 = 120

 S.P. C.P. 120 100 648 ?

C.P. = 100 × 648/120 = 540

The purchase price for the book seller is Rs 540.

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