In the following question two statements are given and these statements are…
2025
In the following question two statements are given and these statements are followed by two conclusions numbered (1) and (2). You have to take the given two statements to be true even if they seem to be at variance from commonly known facts. Read the conclusions and then decide which of the given conclusions logically follows from the two given statements, disregarding commonly known facts.
Give answer:
(A) If only (1) conclusion follows
(B) If sonly (2) conclusion follows
(C) If either (1) or (2) follows
(D) If neither (1) nor (2) follows and
(E) If both (1) and (2) follow
Statement :
All windows are doors .No door is a bat
Conclusion :
1. No window is bat '
2. No bat is door
- A.
A
- B.
B
- C.
C
- D.
E
Attempted by 33 students.
Show answer & explanation
Correct answer: D
Answer: Both conclusions follow (both 1 and 2 are true).
Explanation:
From the statement "All windows are doors" we understand every window is a door (windows ⊆ doors). From "No door is a bat" doors and bats are disjoint (doors ∩ bats = ∅). Therefore windows (being doors) cannot be bats, so the first conclusion "No window is a bat" follows.
The statement "No door is a bat" is logically equivalent to "No bat is a door" (if no member of set A is in set B, then no member of B is in A). Hence the second conclusion "No bat is door" follows.
Conclusion: Both conclusions follow, so the correct response is the choice stating that both conclusions follow.