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WAEC Mathematics 1999 Question 5

Question 5

Commercial Arithmetic

A trader makes a loss of 15% when selling an article. Find the ratio, Selling Price: Cost Price.

  1. A.3 : 20
  2. B.3:17
  3. C.17:20
  4. D.20:23.
Show the answer and explanation

Answer: C (17:20)

Explanation

With a 15% loss the selling price is 85% of the cost price: 85 : 100 = 17 : 20.