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If a country's working-age share was 68 percent and twenty years later is 58 percent, while the elderly share rises from 12 to 24 percent, what happens to the child share?

Answer and explanation

Correct answer: From 20 to 18 percent

The three broad age groups must together make 100 percent of the population: children, working-age people, and elderly people. Initially, the child share is found by subtracting the other two groups: 100 minus 68 minus 12 equals 20 percent. After twenty years, the child share is 100 minus 58 minus 24, which equals 18 percent. Thus, the child share falls from 20 percent to 18 percent, so choice A is correct.

The change is a fall of 2 percentage points, not a fall of 2 percent relative to the original value. The working-age share decreases by 10 percentage points, while the elderly share rises by 12 percentage points; the remaining balance is reflected in the child share declining by 2 points. Choice B reverses the direction of change, choice C uses the wrong age figures, and choice D ignores that the three groups must sum to 100. This conclusion concerns population shares, not necessarily the absolute number of children.

Related tags

Age Structure ChangeChild SharePopulation AgeingPercentage CalculationPopulation CompositionAge StructureGeographyClass 12 Mcq

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