Answer:
For serving size 50 the ratio of size to pounds of meat different from the other ratios.
Explanation:
We have to find the ratio of size to pounds of meat for each size.

For Serving size 20, the Pounds of meat is 2.5

For Serving size 50, the Pounds of meat is 6.5

For Serving size 80, the Pounds of meat is 10

For Serving size 120, the Pounds of meat is 15

For serving size 50 the ratio of size to pounds of meat different from the other ratios.