ECZ 2017 · O-Level Paper 1 — Probability
The probability that Chakupaleza will go for remedial lessons on a particular day is 710. What is the probability that she will not go for her remedial lessons on that particular day?
- A. 710
- B. 310
- C. 107
- D. 1
Verified working — step 1
"Goes" and "does not go" are opposite events - exactly one happens - so their probabilities add up to 1.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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