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UPSC CSE CSAT 2018 · Question 64 · Data interpretation & sufficiency

Directions for the following 2 (two) items: Consider the following graph in which the birthrate…

CSAT 2018 · Q64

Data interpretation & sufficiency Medium

Directions for the following 2 (two) items: Consider the following graph in which the birthrate and death rate of a country are given, and answer the two items that follow.

With reference to the above graph, consider the following statements considering 1970 as base year:

  1. 1.Population has stabilized after 35 years.
  2. 2.Population growth rate has stabilized after 35 years.
  3. 3.Death rate has fallen by 10% in the first 10 years.
  4. 4.Birthrate has stabilized after 35 years.
Line graph, 1970–2010, of birth and death rates per thousand: the birthrate (solid) falls from 30 to about 22.5 in 1990 and 19 in 2000, then levels off at about 18; the death rate (dashed) falls from 25 to about 14 in 1990 and about 6.5 by 2000, then stays near 6.5–7.
From UPSC's question paper.

Which of the above are the most logical and rational statements that can be made from the above graph?

Answer & explanation

Answer: (d) 2 and 4

From 2005 (35 years after 1970) both curves flatten — the birthrate near 18 and the death rate near 6.5–7 — so the birthrate and the growth rate (their gap) have stabilised. The population itself keeps growing, and the death rate fell by much more than 10% in 1970–80.

  1. 35 years after 1970 is 2005; compare the curves from 2005 to 2010.
  2. Birthrate: about 18 throughout; death rate: about 6.5 to 7; gap about 11 throughout.
  3. 1970–80: death rate from 25 to about 21, a fall of about 16%.
  • ✗ 1. Births stay well above deaths after 2005, so the population keeps growing; only its growth rate is steady.
  • ✓ 2. After 2005 the gap between the curves stays at about 11 per thousand, so the growth rate has stabilised.
  • ✗ 3. The death rate falls from 25 to about 21 per thousand in 1970–80, about 16% (4 points), not 10%.
  • ✓ 4. The birthrate curve runs flat at about 18 per thousand from 2005 to 2010.

Remember · A steady growth rate is not a steady population; population stops growing only when births equal deaths.

Question and answer: UPSC's official GS Paper II (2018, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 1 Oct 2026 (how we verify). ·

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