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Ages 20 25 30 35 40 45 Number of people 3 5 1 1 2...

Mathematics
JAMB 1997

Ages 20 25 30 35 40 45
Number of people 3 5 1 1 2 3


Find the median age of the frequency distribution in the table above.

  • A. 20
  • B. 25
  • C. 30
  • D. 35
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Correct Answer: Option B
Explanation

Total freq = 15

Median position = \(\frac{n + 1}{2}\) for odd numbers

Median position =  \(\frac{15 + 1}{2}\) =  \(\frac{16}{2}\) = 8th position.

From the table, the 8th position corresponds to age 25.


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