hard · GMAT Quant
A software suite offers three features: X, Y, and Z. In a sample of 100 users, 80 use X, 70 use Y, and 60 use Z. Every user uses at least one feature. If 30 users use all three features
How many users use exactly one feature?
- 10
- 20
- 30
- 50
- 70
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