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WAEC Further Mathematics 2011 Question 28

Question 28

Statistics

The table shows the distribution of marks of students in a class. Find the upper class boundary of the modal class.
Marks: 5−7, 8−10, 11−13, 14−16, 17−19, 20−22
No. of students: 4, 7, 26, 41, 14, 8

  1. A.13
  2. B.16
  3. C.16.5
  4. D.22.5
Show the answer and explanation

Answer: C (16.5)

Explanation

The modal class is 14−16 (frequency 41). Its upper class boundary is 16.5.