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WAEC Further Mathematics 2015 Question 24

Question 24

Statistics

The table shows the distribution of marks scored by students in a test.
Marks: 0, 1, 2, 3, 4, 5
No. of candidates: 6, 4, 8, 10, 9, 3
How many candidates scored above the median mark?

  1. A.3
  2. B.12
  3. C.22
  4. D.30
Show the answer and explanation

Answer: B (12)

Explanation

40 candidates; the 20th and 21st marks are both 3 (cumulative 6, 10, 18, 28), so the median is 3. Above it: 9 + 3 = 12.