Instructions

In each question below are given three statements followed by four conclusions I II III and IV 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 the given conclusion logically follow from given statements disregarding commonly Known facts

Question 30

Statements
All rods are bricks.
Some bricks are ropes.
All ropes are doors.
Conclusion
I.Some rods are doors.
II.Some doors are bricks.
III.Some rods are not doors.
IV.All doors are ropes.

Solution

Some bricks are ropes. Doors is a super set of ropes. Hence, atleast some doors are bricks as shown in the diagram.

Irrespective of the diagram, conclusions I and III are universally complimentary ie. one of the two always has to be implied but both can't be true at the same time. Hence we use "either" and "or".


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