Using the principle of inclusion-exclusion:
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- Time saved \(= 2 - 1.5 = 0.5\) hours.
- #### 0.5
- In a class of 30 students, 18 play soccer, 12 play basketball, and 5 play both. How many students play neither sport?
- Number playing at least one sport \(= 18 + 12 - 5 = 25\).
- Number playing neither \(= 30 - 25 = 5\).
- A triangle has sides of lengths 7 cm, 24 cm, and 25 cm. Is it a right triangle? If so, find the area.
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