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If population increases from 50 lakh to 60 lakh, what is the growth percentage?

Answer and explanation

Correct answer: 20 percent

The direct answer is C: the growth percentage is 20%. First find the absolute increase: 60 lakh − 50 lakh = 10 lakh. Then compare this increase with the initial population, because percentage growth is calculated from the original or base value: (increase ÷ initial population) × 100 = (10 ÷ 50) × 100 = 20%. Option C is correct. Option A is wrong because it does not equal 10/50 of the original population. Option B is wrong because the correct fraction is one-fifth, or 20%, not 15%. Option D is wrong because 25% would mean an increase of 12.5 lakh on a base of 50 lakh. A common mistake is to divide by the final population; use the initial population as the base. Memory cue: percentage growth = increase ÷ original value × 100.

Related tags

Percentage GrowthPopulation CalculationInitial ValueLakhPopulation GrowthPopulationGeographyClass 9 Mcq

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