hard · GRE Quant
In a fitness center of 100 members, 65 use the treadmill, 55 use the rowing machine, and 45 use the stationary bike.
If every member uses at least one of these machines and 30 members use all three machines, how many members use exactly two of these machines?
- 15
- 35
- 5
- 25
- 45
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