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 cars are trains.
Some trains are tractors.
Conclusions:
I. No tractor is a car.
II. No train is a car.
III. Some tractors are cars.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Either conclusion I or III follows.
The least possible Venn Diagram for the given statements is drawn below:
Conclusions:
I. No tractor is a car → False (It is possible but no definite conclusion can be drawn.)
II. No train is a car → False (It is possible but no definite conclusion can be drawn.)
III. Some tractors are cars → False (It is possible but no definite conclusion can be drawn.)
But, conclusions I and III are complementary to each other, so, either of them follows.
Hence, Either conclusion I or conclusion III follows.