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Question

In each of the questions below are given three statements followed by three conclusions numbered I, II and III. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of given conclusions logically follows from the given statements disregarding commonly known facts.

Statements:

All rollers are coasters.

Some swings are rollers.

All bridges are swings.

Conclusions:

I. All coasters being swings is a possibility.

II. Some swings are not bridges.

III. At least some rollers are definitely swings.

A Only I follows Correct Answer Incorrect Answer
B Only I and III follows Correct Answer Incorrect Answer
C Only II follows Correct Answer Incorrect Answer
D All I, II and III follow Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

Some swings are rollers(I) + All rollers are coasters(A) ⇒ Some swings are coasters(I) ⇒Probable conclusion ⇒ All coasters may be swings(A). Hence, conclusion I follows. All bridges are swings(A) ⇒ Conversion ⇒ Some swings are bridges(I). Hence, conclusion II does not follow. Some swings are rollers(I) ⇒ Conversion ⇒ Some rollers are swings(I). Hence, conclusion III follows.

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