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1. Maha Bazaar offers 20% discount on bags which have been marked 50% above the cost price. Amarnath pays Rs. 840 for a bag. Then the cost price of the bag is = ?

A. Rs. 672

B. Rs. 700

C. Rs. 790

D. Rs. 810

Solution:

Let the cost price of bag is = 100 units
∴ Marked price of the bag = 150 units
Selling price of the bag :

\begin{aligned} 150 \times \frac{80}{100} = 120 units \\ 120 units  =  Rs. 840 \\ 1 units  =  7 \\ 100 units  =  Rs. 700 \end{aligned}

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