1. A shopkeeper earns a profit of 12% on selling a book at 10% discount on printed price. The ratio of the cost price to printed price of the book is





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  • By: anil on 05 May 2019 01.56 am
    Let M.P. = $$100x$$ Discounted amount = $$frac{10}{100} * 100x = 10x$$ => S.P. = $$100x - 10x = 90x$$ Let C.P. = $$100y$$ Now, we need to find $$frac{y}{x}$$ Profit % = 12% => $$frac{90x - 100y}{100y}$$ * 100 = 12 => $$2250x = 2800y$$ => $$frac{y}{x}$$ = $$frac{45}{56}$$
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