How many students like Maths in total (including those who like both)?
- A.20
- B.24
- C.30 ✓
- D.34
Explanation: Everyone who likes Maths is either in the 'only Maths' region or the 'both' region: 20 + 10 = 30.
Class 6 IMO Mathematics Olympiad practice · Data & Measurement · Data Handling & Presentation
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