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In a country, the elderly share rises from 12 percent to 18 percent while the total population also increases. Which conclusion is definitely correct?

Answer and explanation

Correct answer: The absolute number of elderly people has increased

The governing concept is the relationship between a group’s share and the total population. Initially, the elderly number equals 12 percent of the original total. Later, the total population is larger and the elderly share is 18 percent. Since both the base population and the proportion applied to it have increased, the absolute elderly population must be larger. For example, 12 percent of 100 is 12, whereas 18 percent of even 110 is 19.8. Option A is therefore certain. The other options make claims not supported by the data: children need not disappear, the working-age group need not halve, and the birth rate need not double.

Related tags

Elderly PopulationPercentage ChangeAbsolute NumberPopulation AgeingAge StructurePopulation CompositionGeographyClass 12 Mcq

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