To find the serving size for which the ratio of serving size to pounds of meat is different from the others, we can calculate the ratio for each of the serving sizes listed.
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For 20 servings:
- Ratio = 20 servings / 2 pounds = 10
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For 40 servings:
- Ratio = 40 servings / 6 pounds = 6.67 (approximately)
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For 80 servings:
- Ratio = 80 servings / 8 pounds = 10
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For 120 servings:
- Ratio = 120 servings / 12 pounds = 10
Now we can summarize the ratios:
- 20 servings = 10
- 40 servings = 6.67
- 80 servings = 10
- 120 servings = 10
The only ratio that is different is for 40 servings, which has a ratio of approximately 6.67, while all other serving sizes have a ratio of 10.
Therefore, the serving size with the error is 40 servings.