ECZ 2015 · O-Level Paper 1 — Social and Commercial Arithmetic
Chanda changed $620 into Zambian Kwacha at an exchange rate of $1 = K6.25. He later changed all the Zambian Kwacha back into American Dollars ($) at an exchange rate of $1 = K6.20. Calculate the profit made.
- A. $5
- B. $625
- C. $4.96
- D. $31
Verified working — step 1
620 × 6.25 = K3 875. Converting back: 3 875 ÷ 6.20 = $625. Profit = 625 − 620 = …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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