Answer: There are 3 quarts of concentrate and 9 quarts of water.
Explanation:
Since we have given that
Ratio of number of quarts of water to number of quarts of concentrate is
3:1
Number of quarts of orange juice from concentrate and water = 12 quarts
So, the number of quarts of concentrate would be

the number of quarts of water would be

Hence, there are 3 quarts of concentrate and 9 quarts of water.