Final answer:
By setting up a proportion based on the given ratio of chocolate chips to cookies, it is determined that it takes 10 cups of chocolate chips to make 15 cookies.
Step-by-step explanation:
To solve this problem, we need to determine the proportion of chocolate chips needed per cookie and then scale it for 15 cookies. Since 8 cups of chocolate chips make 12 cookies, we can set up the following proportion:
8 cups / 12 cookies = x cups / 15 cookies
To find the unknown value 'x', which represents the cups of chocolate chips needed for 15 cookies, we cross multiply and solve for 'x':
(8 cups * 15 cookies) / 12 cookies = x cups
120 cups / 12 = x cups
x = 10 cups
Therefore, it takes 10 cups of chocolate chips to make 15 cookies.