hard · GMAT Quant
A retail survey of 120 customers tracks purchases of three items: A, B, and C. 70 bought A, 60 bought B, and 50 bought C. If 20 customers bought all three and 10 bought none
What is the maximum number of customers who could have bought A and B but not C?
- 10
- 20
- 30
- 40
- 50
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