Given U = {11, 12, 13, 14, 15, 16, 17, 18, 19, 20}, A = {odd numbers in U} and B = {even numbers in U less than 20}, find (A ∪ B)′.

University of Ilorin MTH101 2026-exam past question

1. {12, 14, 16, 18}
2. {11, 13, 15, 17, 19}
3. {11, 12, 13, 14, 15, 16, 17, 18, 19}
4. {20}

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