Answer
The student ate 72ounces of fruit snacks
Explanation
If there are 20packs of fruit snacks in a box and each pack weighs 6 ounces, the total weight of 20packs will be 20×6 = 120ounces
If there are 48 ounces of fruit snacks left in the box after student has eaten some, the amount of ounces of fruit eaten by the student will be:
Total number of ounces of 20packs - weight of left over snacks
= 120-48
= 72ounces
