medium · GMAT Quant
In a project with 100 tasks, 50 are Priority A, 40 are Priority B, and 30 are Priority C. 20 tasks are both A and B, 15 are both B and C, and 10 are both A and C, while 5 tasks are in all three priorities.
How many tasks have none of these priority designations?
- 45
- 15
- 20
- 30
- 25
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