1. A dishonest dealer marks up his goods by 20% and gives a discount of 10% to the customer. Beside this, he also cheats his supplier by 20% and his customer by 10% through faulty balances. Find his overall profit percentage.
A) 35%B) 44%C) 50%D) 40%
✓ Correct Answer: Option B
Explanation: Let the standard weight be 1000 g and Cost Price (CP) be ₹1 per gram.<br>
1. Cheating supplier by 20%: He gets 1200 g for the price of 1000 g. So, CP of 1200 g = ₹1000.<br>
2. Markup and Discount: $MP = 1.20 \times CP$, $SP = 0.90 \times MP = 0.90 \times 1.20 = 1.08$ per gram.<br>
3. Cheating customer by 10%: He sells 900 g but charges for 1000 g.<br>
Total SP for 1000 units charged = $1000 \times 1.08 = ₹1080$.<br>
But he only gave 900 g. In the first step, we found CP of 1200 g is ₹1000.<br>
So, CP of 900 g = $\left(\frac{1000}{1200}\right) \times 900 = ₹750$.<br>
Profit Percentage = $\left(\frac{1080 - 750}{750}\right) \times 100 = \left(\frac{330}{750}\right) \times 100 = 44%$.