Answer:
The Garcia family have left 11 pints of milk after lunch.
Explanation
The Garcia family started the day with 2 gallons of milk.
As we know there is :
1 gallon = 8 pints or 4 quarts
Therefore, 2 gallons = 16 pints or 8 quarts
1 Quart = 2 pints
Now we place all the data in pints
The Garcia family started the day with 16 pints (2 gallons) of milk.
They drink 1 quart (2 pints) for breakfast and 3 pints for lunch.
Drank total milk = 2 pints + 3 pints = 5 pints
Now they left after lunch = 16 - 5 = 11 pints.
The Garcia family have left 11 pints of milk after lunch.