Answer: 3
Step-by-step explanation:
This problem is looking for the Greatest Common Factor (GCF) of 6 and 15.
Draw a factor tree for each number and see what they have in common.
      Reg     Diet
        6        15
        ∧        ∧
      2  3      3  5
The GCF of 6 and 15 = Â 3
Each table will contain 2 cans of regular soda and 5 cans of diet soda.