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1. The marked price of an item is twice the cost price. For a gain of 15%, the discount should be:

A. 7.5%

B. 20.5%

C. 32.5%

D. 42.5%

Solution:

Let CP = Rs. 100
MP = Rs. 200
Gain = 15%
SP = 100 + 15% of 100 = Rs. 115
Discount = 200 - 115 = 85
% Discount =

\frac{85 \times 100}{200}

= 42.5%

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