Final answer:
To make 6 cups of icing that is the same shade of pink, you need 24 drops of red coloring.
Step-by-step explanation:
To make 1 cup of pink icing, you add 4 drops of red coloring to 1 cup of white icing. To make 6 cups of icing that is the same shade of pink, you need to scale up the ingredients proportionally.
Let's set up a proportion:
1 cup / 4 drops = 6 cups / x drops
Cross multiplying, we get:
x drops = 6 cups * 4 drops / 1 cup = 24 drops
So, you will need 24 drops of red coloring to make 6 cups of pink icing.