ISRO Electronics & Communication (ECE) 2023 - Question 90

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Topic: Aptitude/Ability Test

Fact 1: Pictures can tell a story.
Fact 2: All storybooks have pictures.
Fact 3: Some storybooks have words.
If the first three statements are facts, which of the following statements must also be a fact?
I: Pictures can tell a story better than words can.
II: The stories in storybooks are very simple.
III: Some storybooks have both words and pictures.

  • A. I only
  • B. II only
  • C. III only
  • D. None of the statements is a known fact

Answer: C. III only

Explanation: Based on Fact 2, EVERY storybook has pictures. Based on Fact 3, SOME of those storybooks also have words. Therefore, the specific storybooks that have words MUST also have pictures. This makes statement III an absolute fact. Statements I and II introduce subjective opinions ('better', 'very simple') not supported by the premises.

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