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WAEC Mathematics 2014 Question 30

Question 30

Ratio, Percentages and Rates

If x : y = 3 : 2 and y : z = 5 : 4, find the value of x in the ratio x : y : z.

  1. A.8
  2. B.10
  3. C.15
  4. D.20
Show the answer and explanation

Answer: C (15)

Explanation

Make y equal: x : y = 15 : 10 and y : z = 10 : 8, so x : y : z = 15 : 10 : 8 and x = 15.