A person marked his goods at a price that would give him 40% profit. But he declared a sale and allowed 20% discount on the marked price. What is the profit percentage of the person in the whole transaction?

Marked price = 1.40 × cost price (40% profit). After 20% discount, selling price = 0.80 × 1.40 × cost = 1.12 × cost. This gives 12% profit overall. Option A is correct. Option B (32%) assumes the profit percentages add directly. Option C (30%) ignores the discount. Option D (20%) is the discount rate, not the final profit.