ECZ 2019 · O-Level Paper 1 — Sequences and Series
Given that 17, m, 27, ... are consecutive terms of an Arithmetic Progression, find the arithmetic mean, m.
- A. 10
- B. 22
- C. 20
- D. 44
Verified working — step 1
For three consecutive terms in an AP, the middle term is the mean of the two outer terms.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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