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If birth rate is twelve per thousand and death rate is nine per thousand, what will be the natural increase rate?

Answer and explanation

Correct answer: Three per thousand

The direct answer is A: three per thousand. Natural increase measures the change caused by births and deaths alone; migration is not included. Use the formula: natural increase rate = birth rate − death rate. Here, the birth rate is 12 per thousand and the death rate is 9 per thousand. Subtract step by step: 12 − 9 = 3 per thousand. Therefore, the natural increase rate is 3 per thousand. Option A is correct. Option B, 9 per thousand, is only the death rate and does not show the difference between births and deaths. Option C, 12 per thousand, is only the birth rate and ignores deaths. Option D, 21 per thousand, results from adding the two rates, but deaths reduce population, so they must be subtracted. A useful warning is that total population growth may also include net migration, but this question asks for natural increase only. Memory cue: births add, deaths subtract.

Related tags

Natural Increase RateBirth RateDeath RatePopulation GrowthPopulationGeographyClass 9 Mcq

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