1. A shopkeeper marks up his goods by \(40\%\) and gives a discount of \(15\%\). If he uses a faulty balance that reads \(1000\text{g}\) for \(800\text{g}\), what is his net profit percentage?
A) \(45\%\)
B) \(42.5\%\)
C) \(50\%\)
D) \(48.75\%\)
Correct Answer: D
<strong>Explanation:</strong> Let CP of \(1000\text{g} = 100\). MP \(= 140\). SP after \(15\%\) discount \(= 140 \times 0.85 = 119\). He gives \(800\text{g}\) which costs him \(80\). Profit \(= 119 - 80 = 39\). Profit \(\% = (39/80) \times 100 = 48.75\%\).


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