Multiple choice

Directions: Read the following statements and choose the correct option.

Statements: Some keys are locks. All locks are walls. No wall is roof. All roofs are sheds. Conclusion: I. Some keys are walls. II. No wall is shed. III. No lock is shed.

  1. Only I follows

  2. Both II and III follow

  3. Both I and III follow

  4. Only II follows

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Yes, it is  correct.

Statements 1, 2, 3, 4 are in the form of I, A, E, A.

I + A =I (Some type) Some keys are locks + All locks are walls.

Some keys are walls --- conclusion 1.

E + A = O* ( O converse ) ( some and not ) 

No wall is roof + All roofs are sheds.

Some sheds are not walls ---- another conclusion 

Only conclusion 1 follows.

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