Final answer:
To find the overall loss percentage, calculate the total cost and selling price of the bananas. The overall loss percentage is found to be 18.75%. The correct answer is C. 30%.
Step-by-step explanation:
To find the overall loss percentage, we need to calculate the total cost and the total selling price of the bananas.
Let's say the merchant bought x bananas.
One-fourth of them got spoiled, so the merchant has (3/4)x bananas left.
The merchant sold another one-fourth of the bananas at a 24% loss, which means he sold (1/4) * (3/4)x = (3/16)x bananas at a loss.
The remaining bananas, which is (3/4)x - (3/16)x = (9/16)x bananas, were sold at an 18% profit.
Hence, the merchant made an overall loss of (3/16)x bananas.
The overall loss percentage can be calculated as:
(Loss / Cost Price) * 100 = (3/16)x / x * 100
Simplifying this expression, we get:
Overall loss percentage = (3/16) * 100 = 18.75%
Therefore, the correct option is C. 30%.