7.5 cups sugar will be used.
Step-by-step explanation:
Given,
Recipe calls 5 cups of sugar and 2 cups of brown sugar.
After enlarging 3 cups brown sugar is used.
To find the amount of sugar
Solution
2 cups enlarging into 3 cups
That means, [tex]\frac{3}{2}[/tex] times it's increasing.
Hence, 5 cups of sugar is also increasing by [tex]\frac{3}{2}[/tex] times
So, amount of sugar = 5× [tex]\frac{3}{2}[/tex] = [tex]\frac{15}{2}[/tex] = 7.5 cups
