hard · GMAT Quant
A production line audits 250 units for three defects: A, B, and C. 150 units have defect A, 120 have defect B, and 100 have defect C. If 40 units have exactly two defects and every unit has at least one defect
How many units have all three defects?
- 40
- 60
- 80
- 120
- 20
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