New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    Three statements are given, followed by three

    conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: A-     All rocks are oceans.  B-      All oceans are balloons. C-      Some watches are balloons. Conclusions: I. Some balloons are rocks. II. Some watches are oceans. III. All oceans are rocks.
    A Only conclusion II follows. Correct Answer Incorrect Answer
    B Only conclusion I follows. Correct Answer Incorrect Answer
    C Only conclusions I and III follow. Correct Answer Incorrect Answer
    D Only conclusions I and II follow Correct Answer Incorrect Answer

    Solution

    All rocks are oceans (A) + All oceans are balloons (A) → All rocks are balloons (A) → Conversion → Some balloons are rocks (I). Hence conclusion I follows. Some watches are balloons (I) + Some balloons are oceans (I) → No conclusion. Hence conclusion II does not follow. All rocks are oceans (A) → Conversion → Some oceans are rocks (I). Hence conclusion III does not follow.

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