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Age in years 10 - 14 15 - 19 20 - 24 25 - 29...

Further Mathematics
WAEC 2014

Age in years 10 - 14 15 - 19 20 - 24 25 - 29 30 - 34
Frequency 6 8 14 10 12

 

In which group is the upper quartile?

  • A. 15 - 19
  • B. 20 - 24
  • C. 25 - 29
  • D. 30 - 34
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Correct Answer: Option C
Explanation

The upper quartile occurs at the \(\frac{3N}{4}\) position.

= \(\frac{3 \times 50}{4} = 37.5\)

This occurs in the class 25 - 29.


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