Final answer:
Yasser doesn't need any change because the total cost of the frozen yogurt and the amount of money he has are the same.
Step-by-step explanation:
To find out how much change Yasser should receive after purchasing 10 ounces of frozen yogurt with 10 dollars, we need to determine the cost of the yogurt. Let's assume that each ounce of frozen yogurt costs 1 dollar. If Yasser buys 10 ounces of yogurt, it would cost him 10 dollars in total. Since he already has 10 dollars, he doesn't need any change. The total cost of the yogurt and the amount of money he has are exactly the same.