Correct Answer - Option 3 : 33.33%
Given:
He sells goods at profit of 20%.
He used weight of 900 grams instead of 1000 grams at the time of selling.
Formula used:
Profit % = {(Selling price – Cost price )/Cost price} × 100
Calculations:
Let the Cost price of 1000 grams of goods = ₹ 100 ----(1)
⇒ The selling price of 1000 grams = ₹ 120
But, as given, he uses the weight of 900 grams
⇒ Selling price for 900 grams = ₹ 120 ----(2)
Now, The Cost price of 900 grams = ₹ 90
Profit % = {(Selling price – Cost price )/Cost price} × 100
⇒ {( 120 – 90 ) / 90 × 100}
⇒ Profit % = 33.33
∴ His Actual profit percentage is 33.33%.