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Mathematics for IGCSE & O level - Sets (Section 2 - No. 19)

In a class of 30 students, 15 like apples, 10 like bananas, and 5 like both. How many students like either apples or bananas (or both)?
20
25
30
35

Vysvětlení

15 + 10 - 5 = 20

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