Statements: All green are blue. All blue are white Conclusions: Some blue are…

2023

Statements: All green are blue. All blue are white

Conclusions: Some blue are green.Some white are green.Some green are not white.All white are blue.

  1. A.

    Only (1) and (2)

  2. B.

    Only (1) and (3)

  3. C.

    Only (1) and (4)

  4. D.

    Only (2) and (4)

Attempted by 44 students.

Show answer & explanation

Correct answer: A

Key deduction: From the statements we have green ⊂ blue ⊂ white. So every green is also a blue and a white.

  • Conclusion 'Some blue are green' — Follows. Because greens are a subset of blues and the diagram/assumption treats these sets as non-empty, there exist blues that are green.

  • Conclusion 'Some white are green' — Follows. Since all green are white, if greens exist then some whites are green.

  • Conclusion 'Some green are not white' — Does not follow. It contradicts the chain of inclusions because every green is also white.

  • Conclusion 'All white are blue' — Does not follow. The premises give blue ⊂ white (all blue are white), which does not imply white ⊂ blue (all white are blue).

Final answer: Only the conclusions 'Some blue are green' and 'Some white are green' follow.

Explore the full course: Infosys Preparation