UPSC Prelims 2020·CSAT·Quantitative Aptitude·Arithmetic

| Year | Birth rate | Death rate | |---|---|---| | 1911 - 1921 | 48.1 | 35.5 | | 1921 - 1931 | 46.4 | 36.3 | | 1931 - 1941 | 45.2 | 31.2 | | 1941 - 1951 | 39.9 | 27.4 | | 1951 - 1961 | 41.7 | 22.8 | | 1961 - 1971 | 41.1 | 18.9 | | 1971 - 1998 | 37.1 | 14.8 | For which period was the natural growth rate maximum?

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Last updated 23 May 2026, 3:31 pm IST
  1. A1911 - 1921
  2. B1941 - 1951
  3. C1961 - 1971
  4. D1971 - 1981Correct

Explanation

Natural growth rate = Birth rate - Death rate for each period: 1911-1921: 48.1 - 35.5 = 12.6 1921-1931: 46.4 - 36.3 = 10.1 1931-1941: 45.2 - 31.2 = 14.0 1941-1951: 39.9 - 27.4 = 12.5 1951-1961: 41.7 - 22.8 = 18.9 1961-1971: 41.1 - 18.9 = 22.2 1971-1998: 37.1 - 14.8 = 22.3 The maximum natural growth rate of 22.3 occurred in the 1971-1998 period, which corresponds to option D.
Quantitative Aptitude: | Year | Birth rate | Death rate | |---|---|---| | 1911 - 1921 | 48.1 | 35.5 | | 1921 - 1931 | 46.4 | 36.3 | | 1931 - 19
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