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Difficulty: EasyPopulation Concepts and Growth Dynamics

A community in Nigeria has a recorded population distribution comprising 1500015{}000 individuals aged under 1515 years, 4000040{}000 individuals aged 15–6415\text{--}64 years, and 50005{}000 individuals aged 6565 years and above.

What is the demographic dependency ratio for this community?

  1. 50%Answer
  2. B
    200%
  3. C
    33.3%
  4. D
    37.5%

Answer

50%
The dependency ratio measures the number of dependents (aged 0–14 and 65+) relative to the working-age population (aged 15–64). Here, the total dependent population is 15000+5000=2000015{}000 + 5{}000 = 20{}000. Dividing 2000020{}000 by the working-age population of 4000040{}000 gives 0.50.5, which equals 50%50\%.

Step-by-Step Solution

1
Calculate the total dependent population
15000+5000=2000015{}000 + 5{}000 = 20{}000
Dependents consist of individuals under 15 years old and individuals aged 65 years and above.
2
Identify the working-age (independent) population
4000040{}000
The working-age population comprises individuals between 15 and 64 years of age.
3
Apply the Dependency Ratio formula
Dependency Ratio=(2000040000)×100=50%\text{Dependency Ratio} = \left( \frac{20{}000}{40{}000} \right) \times 100 = 50\%
The formula divides the dependent population by the working-age population and expresses it as a percentage.

Key Concept

Demographic Dependency Ratio
Estimated Time:1m 0s
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Topics

Population Concepts and Growth Dynamics

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