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JAMB Mathematics 1994 Question 1

Question 1

Fractions, Decimals and Approximation

Evaluate
1/3 ÷ [5/7(9/10 − 1 + 3/4)]

  1. A.28/39
  2. B.13/84
  3. C.39/28
  4. D.84/13
Show the answer and explanation

Answer: A (28/39)

Explanation

Inside the bracket: 9/10 − 1 + 3/4 = 13/20, and 5/7 × 13/20 = 13/28. Then 1/3 ÷ 13/28 = 1/3 × 28/13 = 28/39.