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  9. Q11

UKPSC PCS 2012 · Question 11 of 78

Consider the six statements : A : All balls are locks. B : All keys are locks. C : All keys are balls. D : Some keys are locks. E : Some locks are balls. F : No ball is lock. Choose the option which indicates a valid argument containing logically related statements, that is, where the third statement is the conclusion drawn from the preceding two statements.

Reasoning

  1. AACDCorrect
  2. BBEF
  3. CCDE
  4. DCEF

Answer: A. ACD

Explanation

'All keys are balls' (C) and 'All balls are locks' (A) yield 'All keys are locks', i.e. 'Some keys are locks' (D).

Source: UKPSC 2012 Prelims CSAT Paper-II (adda247/studyfry PDF), exam held 30 Nov 2014

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