Question

In each of the questions below are given three statements followed by two conclusions numbered I and II. 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:      

No mouse is a keyboard.

Some keyboards are printers.

All printers are scanners.

Conclusions:      

I. Some printers are not mouse.

II. All scanners may be keyboards.

A If only conclusion I follows. Correct Answer Incorrect Answer
B If only conclusion II follows. Correct Answer Incorrect Answer
C If either conclusion I or II follows. Correct Answer Incorrect Answer
D If both conclusion I and II follows. Correct Answer Incorrect Answer

Solution

No mouse is a keyboard(E) + Some keyboards are printers(I) ⇒ Some printers are not mouse(O*). Hence, conclusion I follows. Some keyboards are printers(I) + All printers are scanners(A) ⇒ Some keyboards are scanners(I) ⇒ Probable conclusion ⇒ All scanners may be keyboards. Hence, conclusion II follows.

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