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%.**