Answer:
6/10 of a cup
Explanation:
If you add 3/4 to sherbet and 1 1/2 cup of to gingerale and keep going you will eventually get to 3 cups of sherbet and 5 cups of gingerale. Now, if you divide 3 by 5 you will get 0.6 or 6/10 of a cup. You would divide because you are trying to find how much sherbet PER ONE CUP of gingerale.