ECZ 2012 · O-Level Paper 1 — Probability
A pack of eleven identical cards is labelled 1 to 11. The cards are shuffled and placed upside down. If a card is picked at random from the pack, what is the probability that it is a prime numbered card?
- A. 411
- B. 611
- C. 511
- D. 510
Verified working — step 1
The primes from 1 to 11 are 2, 3, 5, 7 and …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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