Exam CTFL v4.0 topic 1 question 184 discussion

You validate the correctness of price calculation in a food ordering application. The input parameter is the order amount (in $), and the result is the final price reflecting the discount. If the order amount is less than $100, the discount is not granted (0% discount). If the order amount is greater than $500, a 50% discount is granted. In other cases, the 10% discount is granted.

You apply equivalence partitioning for the “order amount” domain to check if discounts are granted correctly.

Which test data set achieves the highest coverage?