ECZ 2020 · O-Level Paper 1 — Sets
Given that E = {3, 6, 9, 12, 15, 18}, A = {6, 9, 12} and B = {3, 6, 18}, list A ∩ B'.
- A. {6}
- B. {9, 12, 15}
- C. {3, 18}
- D. {9, 12}
Verified working — step 1
B' = elements of E not in B = {9, 12, 15}. A ∩ B' = {6, 9, 12} ∩ {9, 12, 15} = …The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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