WAEC Mathematics 2014 Question 31

Question 31

Commercial Arithmetic

A trader bought sachet water for GH¢ 55.00 per dozen and sold them at 10 for GH¢ 50.00. Calculate, correct to 2 decimal places, his percentage gain.

  1. A.8.00%
  2. B.8.30%
  3. C.9.09%
  4. D.10.00%
Show the answer and explanation

Answer: C (9.09%)

Explanation

Cost per sachet = 55/12 ≈ GH¢4.583; selling price = GH¢5.00. Gain = 0.417/4.583 × 100% ≈ 9.09%.