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Marks 5-7 8-10 11-13 14-16 17-19 20-22 No of students 4 7 26 41 14...

Further Mathematics
WAEC 2011

Marks 5-7 8-10 11-13 14-16 17-19 20-22
No of students 4 7 26 41 14 8

The table above shows the distribution of marks of students in a class. Find the upper class boundary of the modal class.

  • A. 13.5
  • B. 16
  • C. 16.5
  • D. 22.5
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Correct Answer: Option C
Explanation

The modal class = 14 - 16

The upper class boundary = \(\frac{16 + 17}{2} = \frac{33}{2} = 16.5\)


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