11th Class Mental Ability Syllogisms Question Bank Question - Syllogism

  • question_answer
    Direction: Each of the following questions contains two statements followed by two conclusions numbered I and II. You have to consider the two statements to be true, even if they seen to be at variance at the commonly known facts. You have to decide which of the given conclusions definitely follows from the given statements.
    You are to give your answer as: (a) if only I follows ; (b) if only conclusion II follows ; (c) if either I or II follows; (d) if neither I nor II follows and (e) if both I and II follow.
    Statement:  
    A. Some pencils are pens.
    B. All pens are erasers.
    C. All staplers are erasers.
    Conclusions:
    I. Some pens are not pencils.
    II. All erasers are pencils.
    III. Some staplers are pens.
    IV. Some staplers are pencils.

    A) Only I follows

    B) Only II follows

    C) Only III follows

    D) Only IV follows

    E) None of these

    Correct Answer: E

    Solution :

    Explanation Option (e) is correct. I conclusion is derived form the given statements because (I + A) + A = I + A. This pair .has no solution. Also no conclusion can be arrived as the immediate inference of the given statements and there is no complementary pair. So none follows.


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