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

    Question

    In each of the questions below are given some statements followed by some Conclusions. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the Conclusions and then decide which of the given Conclusions logically follows from the given statements disregarding commonly known facts.

    Statements: Some Planet are Earth. All

    Earth are Sun. All Sun are Galaxy. Conclusions: I. At least some Sun are Planet. II. All Galaxy being Planet is a possibility. III. Some Sun are not Planet.
    A Only I follows Correct Answer Incorrect Answer
    B Only II follows Correct Answer Incorrect Answer
    C Only I and II follow Correct Answer Incorrect Answer
    D Only III follows Correct Answer Incorrect Answer
    E None follows Correct Answer Incorrect Answer

    Solution

    Alternative Method: Some Planet are Earth (I) + All Earth are Sun (A) → Some Planet are Sun (I) → Conversion → Some Sun are Planet (I). Hence conclusion I follows but conclusion III does not follow. Some Planet are Sun (I) + All Sun are Galaxy (A) → Some Planet are Galaxy (I) → Probable conclusion → All Galaxy may be Planet (A). Hence conclusion II follows.

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