ECZ 2016 · O-Level Paper 1 — Probability
There are 45 green and red marbles in a bag. The probability of choosing a green marble is 2⁄5. Calculate the number of green marbles.
- A. 27
- B. 9
- C. 90
- D. 18
Verified working — step 1
Number of green = P(green) × total = 2⁄5 × 45 = …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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