ECZ 2019 · O-Level Paper 1 — Matrices
Given that (1 2 3) 1x5 = (24), find the value of x.
- A. 5
- B. 4
- C. 3
- D. 8
Verified working — step 1
A (1 × 3) row times a (3 × 1) column collapses to one number: multiply matching entries, add the products, then equate to 24.The full step-by-step working and final answer, plus the video lesson for this topic, 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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