A vendor sells two types of fruit: apples and bananas. An apple costs $0.75 and a banana costs $0.50. If a customer buys a total of 15 fruits for $9.00, how many apples did the customer buy?

✓ Correct Answer: Option A

Let 'A' be apples and 'B' be bananas. A + B = 15 and 0.75A + 0.50B = 9. From A+B=15, B=15-A. Substitute: 0.75A + 0.50(15-A) = 9. This simplifies to 0.75A + 7.5 - 0.50A = 9. So, 0.25A = 1.5, which means A = 6.