ECZ 2011 · O-Level Paper 1 — Sets
A set has 6 proper subsets. How many elements does it have?
- A. 3
- B. 2
- C. 6
- D. 4
Verified working — step 1
This paper counts proper subsets as 2n - 2: the empty set AND the set itself are both left out.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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