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If child dependency is 40 and elderly dependency is 15 per 100 working-age persons, what is the total dependency ratio?

Answer and explanation

Correct answer: 55

The total dependency ratio combines child dependency and elderly dependency because both children and older people are treated as dependent groups in this measure. The question gives both figures using the same base: per 100 working-age persons. Therefore, they can be added directly: 40 child dependents plus 15 elderly dependents equals 55 total dependents per 100 working-age persons. Hence, choice C is correct.

There is no need to divide again or convert the figures, because both ratios already have the same denominator. Choice A results from subtracting one figure from the other, which has no demographic basis. Choice B leaves out elderly dependency, while D adds an unsupported extra amount. The result does not mean that 55 percent of the entire population is dependent; it means that the number of dependents is 55 for every 100 people in the working-age group. This distinction between a ratio and a population share is important.

Related tags

Total DependencyChild DependencyElderly DependencyAge StructurePopulation CompositionGeographyClass 12 Mcq

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