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JAMB Mathematics 2014 Question 5

Question 5

Commercial Arithmetic

A man donates 10% of his monthly net earnings to his church. If it amounts to ₦4,500, what is his net monthly income?

  1. A.₦62,500
  2. B.₦40,500
  3. C.₦45,000
  4. D.₦52,500
Show the answer and explanation

Answer: C (₦45,000)

Explanation

If 10% is ₦4,500, then 100% is 10 × ₦4,500 = ₦45,000.