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Which option gives the population growth rate formula correctly?

Answer and explanation

Correct answer: (P₂ − P₁) / P₁ × 100 / (P₂ − P₁) / P₁ × 100

Direct answer: Option A is correct. Population growth rate expresses the change in population as a percentage of the earlier or base population. If P₁ is the initial population and P₂ is the later population, the formula is (P₂ − P₁) ÷ P₁ × 100. First subtract the earlier population from the later one to find the change. Then divide that change by the initial population, and finally multiply by 100 to convert it into a percentage. Option B reverses the basic quantities and is not a growth-rate formula; population divided by area is related to density. Option C compares deaths with births and does not calculate population growth rate. Option D uses unrelated variables and has no demographic meaning. Memory cue: change ÷ starting population × 100; the denominator is the base population, not area.

Related tags

Population Growth RateFormulaBase PopulationPopulation GrowthPopulationGeographyClass 9 Mcq

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