Venn diagram sorting the numbers 1 to 20: even numbers and multiples of 3
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Answer key
- n(U) = 20
- n(Even) = 10
- n(Multiples of 3) = 6
- n(Even ∩ Multiples of 3) = 3
- n(Even ∪ Multiples of 3) = 13
- Even only: 2, 4, 8, 10, 14, 16, 20
- Even and Multiples of 3: 6, 12, 18
- Multiples of 3 only: 3, 9, 15
- Neither: 1, 5, 7, 11, 13, 17, 19
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