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WAEC Mathematics 2014 Question 42

Question 42

Measures of Dispersion

In a cumulative frequency graph, the lower quartile is 18 years while the 60th percentile is 48 years. What percentage of the distribution is at most 18 years or greater than 48 years.

  1. A.15%
  2. B.35%
  3. C.65%
  4. D.85%
Show the answer and explanation

Answer: C (65%)

Explanation

25% are at most 18 (lower quartile) and 100% − 60% = 40% are above 48. Total 65%.