Answer:
10 cups of canberry juice
Step-by-step explanation:
Given that for every 3 cups of punch, he uses 2 cups of cranberry juice.
we need to find the number of canberry juice needed to make 15 cups of punch
3 cup's of punch ---> 2 cups of canberry juice
15 cups's of punch ----> x cups of canberry juice
on cross multiplication we get
x = 10
Therefore we need 10 cups of canberry juice