ECZ 2022 · O-Level Paper 1 — Probability
The probability that a boy will be late for school on any particular day is x. Find, in terms of x, the probability that he will not be late for school.
- A. 1 + x
- B. x
- C. x - 1
- D. 1 - x
Verified working — step 1
"Late" and "not late" are opposite events - exactly one happens each day - 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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