A retail fruit vendor buys a score of apples for ₹400 and retails them for ₹264 at a dozen. What was his loss/gain per cent? (a score = 20 no’s)

The correct option is 10% profit.

Step 1: Find the Cost Price (CP) of one apple

We are given that 1 score of apples = 20 apples.

Cost price of 20 apples = ₹400

Cost price of 1 apple =

$\frac{400}{20}=\text{₹20}$

Step 2: Find the Selling Price (SP) of one apple

We are given that 1 dozen apples = 12 apples.

Selling price of 12 apples = ₹264

Selling price of 1 apple =

$\frac{264}{12}=\text{₹22}$

Step 3: Calculate the Profit

Since the selling price (₹22) is greater than the cost price (₹20), the vendor makes a profit.

Profit = Selling Price - Cost Price

Profit = ₹22 - ₹20 = ₹2

Step 4: Calculate the Profit Percentage

Profit % =

$\left(\frac{\text{Profit}}{\text{Cost Price}}\right)\times 100$

Profit % =

$\left(\frac{2}{20}\right)\times 100=10\%$

Thus, the vendor made a 10% profit.