Answer:
B
Explanation:
Given
pitchers of grape juice=g=4
picthers of orange juice=o=6
Each pitcher contains 64 oz of juice
So in order to calculate, we will calculate the total number of pitchers and then multiply it by 64 to get total oz.
=(6+4)*64
=10*64
=640 oz
We can see that we added count of pitchers and then multiplied the sum by 64.
So option B is the correct answer ..