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Question

Read the given statement(s) and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statement(s).

Statements:
All Wolves are Rhinoceroses.
No Rhinoceroses are Kangaroos.

Conclusions:
I: No Kangaroos are Wolves.
II: Some Kangaroos are Wolves.

This question was previously asked in
RRB NTPC 2024 CBT 1 Question Paper (28-Aug-2025) (Shift 3)
The correct answer is
Only conclusion (I) follows.

Statement Analysis

We are given two statements:

  • Statement 1: All Wolves are Rhinoceroses. (Let W = Wolves, R = Rhinoceroses. This means W is a subset of R.)
  • Statement 2: No Rhinoceroses are Kangaroos. (Let K = Kangaroos. This means the set R and the set K are disjoint. $R \cap K = \emptyset$. )

Conclusion Evaluation

Let's evaluate the given conclusions based on the statements:

Conclusion I: No Kangaroos are Wolves.

From Statement 1, all Wolves belong to the Rhinoceros category ($W \subseteq R$).

From Statement 2, no Rhinoceroses belong to the Kangaroo category ($R \cap K = \emptyset$).

Since every Wolf is a Rhinoceros, and no Rhinoceros can be a Kangaroo, it logically follows that no Wolf can be a Kangaroo. This is equivalent to saying "No Kangaroos are Wolves".

Conclusion I logically follows.

Conclusion II: Some Kangaroos are Wolves.

As established above, "No Kangaroos are Wolves" is a valid deduction. This directly contradicts the conclusion that "Some Kangaroos are Wolves".

Conclusion II does not logically follow.

Final Decision

Based on the analysis, only Conclusion I is logically derived from the given statements.

Therefore, the correct option is the one stating that only conclusion (I) follows.

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Similar Questions

  1. Read the given statement(s) and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statement(s).

    Statements:
    All Hummingbirds are Storks.
    Some Storks are Flamingos.

    Conclusions:
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  6. Two statements are given below. Decide which of the options logically follow from these statements.

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    (i) All ships are boats.
    (ii) All anchors are ships.

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    I. All anchors are boats.
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    No carpet is a mat.

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Important Questions from Syllogism

  1. Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

    Statements:

    Some students are players.

    All players are male.

    Conclusions:

    I. All males are players.

    II. Some males are students.

  2. Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

    Statements:

    No creative is an employer.

    All experts are creative.

    All workers are experts.

    Conclusions:

    I. No employer is an expert.

    II. No worker is an employer.

  3. Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

    Statements:

    Some actors are choreographers.

    All choreographers are producers.

    Not a single producer is a director.

    Conclusions:

    I. Some actors are directors.

    II. Not a single actor is a director.

  4. Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

    Statements : 

    1. All flowers are tulips.

    2. No tulips are whites.

    Conclusions :

    I. All tulips are flowers.

    II. Some tulips are whites.

  5. Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

    Statements:

    All rats are dogs.

    Some rats are hens.

    Conclusions:

    I. Some rats are dogs.

    II. Some hens are rats.

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