CSAT 2021

Q. Half of the villagers of a certain village have their own houses. One-fifth of the villagers cultivate paddy. One-third of the villagers are literate. Four-fifth of the villagers are under 25 years of age. Which one of the following statements is certainly correct?

(a) All the villagers who have their own houses are literate.
(b) Some villagers are under 25 years of age are literate.
(c) Only half of the villagers who cultivate paddy are literate.
(d) No villager under 25 years of age has his own house.
Correct Answer: (b) Some villagers are under 25 years of age are literate.

Question from UPSC Prelims 2021 CSAT Paper

Explanation : 

Village Demographics Analysis

The correct answer is (b) Some villagers under 25 years of age are literate. This is because the given information states that one-third of the villagers are literate and four-fifth of the villagers are under 25 years of age.

Therefore, it is possible that some villagers who are under 25 years of age are also literate because one third is larger than one-fifth.

Village Demographics Analysis

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