Answer: 80 cups
Step-by-step explanation:
Cory brings 5 one gallon jugs of juice to serve during parent night so we can also say that Cory brought 5 gallons of juice.
The cups he uses are 8 fluid ounces:
1 gallon = 128 fluid ounces
The amount of juice that he brought in fluid ounces is therefore:
= 128 * 5
= 640 fluid ounces
The number of drinks he can therefore serve is:
= 640/8
= 80 cups