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JAMB Mathematics 1985 Question 7

Question 7

Ratio, Percentages and Rates

If three numbers p, q, r are in the ratio 6:4:5, find the value of (3p − q)/(4q + r)

  1. A.3/2
  2. B.2/3
  3. C.2
  4. D.3
  5. E.18.
Show the answer and explanation

Answer: B (2/3)

Explanation

Put p = 6, q = 4, r = 5: (18 − 4)/(16 + 5) = 14/21 = 2/3.