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If population changes from 50 lakh to 45 lakh what kind of change is it?

Answer and explanation

Correct answer: Decrease of 5 lakh

Correct answer: B, a decrease of 5 lakh. Compare the final value with the initial value: 45 lakh is smaller than 50 lakh, so the direction is a decrease. Subtract the smaller number from the larger number: 50 lakh − 45 lakh = 5 lakh. Thus the population has fallen by 5 lakh. A is incorrect because, although the decrease equals 10% of the initial population, it is not an increase. C reverses the direction of change, and D claims that 50 lakh people were added, which did not happen. If a percentage were asked, the fall would be (5 ÷ 50) × 100 = 10%. Memory cue: check direction first, then calculate the difference.

Related tags

Population DeclineAbsolute ChangePercentage DecreasePopulation GrowthPopulationGeographyClass 9 Mcq

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