Cost price (CP) of 1 dozen lemons = Rs. 25
Selling price (SP) of 5 lemons = Rs. 12
Selling price (SP) of 1 lemon = Rs. 12/5 = Rs. 2.40
Selling price of 12 lemons (1 dozen) = Rs. (12 x 2.40) = Rs. 28.80
Now, we know that, if SP > CP, then its profit.
Profit = SP - CP
Therefore, profit earned by the seller,
⇒ Profit = SP - CP
= Rs. 28.80 - Rs.25
= Rs. 3.80
Profit percentage = (Profit x 100 / CP)
\(=\frac{(3.80\times 100)}{25}\)
= 3.80 x 4
= 15.2%
Thus, the vendor earns 15.2% profit.
