In the question below are given two statements followed by three conclusions I, II and III. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. Statements: Some tapes are old. All tapes are lift. Conclusions: I. All lifts are tapes. II. Some lifts are old. III. No Lift is old.
In the question below are given two statements followed by three conclusions I, II and III. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. Statements: Some tapes are old. All tapes are lift. Conclusions: I. All lifts are tapes. II. Some lifts are old. III. No Lift is old. Correct Answer Only II follow
The least possible Venn diagram for the given statements is as follows,
[ alt="RRBOA MFT9 17 Aug 20q part2 Reviewed images q6" src="//storage.googleapis.com/tb-img/production/18/09/RRBOA_MFT9_17%20Aug_20q_part2%20Reviewed_images_q6.PNG">
Conclusions:
I. All lifts are tapes → False (it is possible but not definite)
II. Some lifts are old → True (as shown in the diagram)
III. No Lift is old → False (As some tapes are old and all tapes are lift, some lift will definitely be old. Hence this statement is definitely false)
Therefore, only conclusion II follows.