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If population changes from 80 lakh to 72 lakh, what is the correct interpretation?

Answer and explanation

Correct answer: Decrease of 8 lakh and 10 percent decline

The correct answer is B: a decrease of 8 lakh and a 10 percent decline. Subtract the final population from the initial population: 80 lakh − 72 lakh = 8 lakh. Since the final value is smaller, this is a decrease, not growth. Now use the initial population as the base: (8 ÷ 80) × 100 = 10%. Option A has the correct amount but the wrong direction; the population did not increase. Option B correctly states both the amount and the direction. Option C incorrectly treats the final population as the change. Option D adds the two populations, but change is found by subtraction. Memory cue: a smaller final value means decline, and percentage change is divided by the starting value.

Related tags

Population DeclinePercentage DecreaseAbsolute ChangePopulation GrowthPopulationGeographyClass 9 Mcq

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