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WAEC Further Mathematics 2013 Question 31

Question 31

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Find the upper quartile of the following scores: 41, 29, 17, 2, 12, 33, 45, 18, 21, 43 and 5.

  1. A.45
  2. B.41
  3. C.33
  4. D.21
Show the answer and explanation

Answer: B (41)

Explanation

In order: 2, 5, 12, 17, 18, 21, 29, 33, 41, 43, 45. The upper quartile is the ¾(11 + 1) = 9th score, 41.