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1. A shopkeeper earns a profit of 10% after allowing a discount of 20% on the marked price. The cost price of the article whose marked price is Rs. 880, is = ?

A. Rs. 704

B. Rs. 640

C. Rs. 774

D. Rs. 680

Solution:

Market price of the article = Rs. 880
After discount selling price of the article

\begin{aligned} = \frac{880 \times 80}{100} \\ =  Rs . 704 \\ Cost price of the article \\ = \frac{704 \times 100}{110} \\ = Rs . 640 \end{aligned}

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