Answer: Ms. Van Vugt will need 2 cups of milk or 1 pint of milk to make 48 brownies.
Step-by-step explanation: For this situation, we know for every 12 brownies she will use 1/2 cup of milk. So we can count up for every 12 brownies.
12 brownies = 1/2 cup of milk
24 brownies = 1 cup of milk
36 brownies = 1 1/2 cup of milk
48 brownies = 2 cups of milk
So, Ms. Van Vugt will need 2 cups of milk or 1 pint of milk to make 48 brownies.