hard · Gre Quant
In a research cohort of 150 participants, 85 people follow Diet A, 70 follow Diet B, and 60 follow Diet C. The records show that 40 follow both A and B, 35 follow both A and C, and 30 follow both B and C. If 20 participants follow all three diets, how many follow none of these diets?
- 10
- 20
- 30
- 15
- 25
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