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WAEC Mathematics 2011 Question 45

Question 45

Commercial Arithmetic

A shopkeeper allows a discount of 15% on the marked price of a mobile phone. If a customer paid GH¢170.00 for a mobile phone, what was the marked price of the phone?

  1. A.GH¢144.50
  2. B.GH¢195.40
  3. C.GH¢200.00
  4. D.GH¢225.00
Show the answer and explanation

Answer: C (GH¢200.00)

Explanation

After a 15% discount the customer pays 85% of the marked price. Marked price = 170 × 100/85 = GH¢200.00.