Correct Answer - Option 1 : 35%
Given:
Cost price of 6 pens = Rs. 20
The selling price of 4 pens = Rs. 18
FormulaUsed:
Cost price = Selling price - Profit
Profit% = (Profit/Cost price) × 100
Calculation:
Cost price of 6 pens = Rs. 20
⇒ Cost price of 1 pen = 20/6 = 10/3
The selling price of 4 pens = Rs. 18
⇒ The selling price of 1 pen = 18/4 = 9/2
⇒ Profit = 9/2 - 10/3 = 7/6
Profit% = (Profit/Cost price) × 100
⇒ Profit% = \(\frac{\frac{7}{6}}{\frac{10}{3}} \times 100\)
∴ Profit% = 35%
The correct option is 1 i.e. 35%
