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JAMB Mathematics 1986 Question 48

Question 48

Measures of Central Tendency

The people in a city with a population of 0.9 million were grouped according to their ages. Use the diagram below to determine the number of people in the 15 − 29 years group.

Diagram for this question
  1. A.29 × 104
  2. B.26 × 104
  3. C.16 × 104
  4. D.13 × 104.
Show the answer and explanation

Answer: B (26 × 104)

Explanation

The 15–29 sector is 104°, so the number is 104/360 × 900 000 = 260 000 = 26 × 10⁴.