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Logical Reasoning - Logical Deduction - Discussion

Discussion Forum : Logical Deduction - Section 2 (Q.No. 11)
Logical Deduction
Directions to Solve

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

11.

Statements: Some taxis have horns. Some taxis have lights.

Conclusions:

  1. Every taxi has either horn or light.
  2. Some taxis have neither light nor horn.
  3. Some taxis have horns as well as lights.
  4. No taxi has horn as well as light.

Only I and II follow
Only II and III follow
Only II and IV follow
Either III or IV follows
All follow
Answer: Option
Explanation:
Since both the premises are particular, no definite conclusion follows. However, III and IV form a complementary pair. Thus, either III or IV follows.
Discussion:
12 comments Page 1 of 2.
Beg bahadur shrestha said:   3 years ago
How 4th conclusion follows? please explain me.
(3)
Kickass said:   1 decade ago
1st and 4th are not possible, also they can be interpreted from the Venn diagram.

Anyways, this site has a lot of questions whose answers are debatable or are entirely wrong.
(1)
AGF said:   9 years ago
According to me, II and III are correct.
(1)
VAIBHAV said:   7 years ago
According to me, 1st&4th can't possible only 2nd &3rd conclusion is correct.
(1)
Rooby said:   7 years ago
@All.

The right answer is 2 and 3rd using Venn diagram.
(1)
Rushikesh said:   5 years ago
Yes, the right answer is 2 and 3.
(1)
Rushikesh said:   5 years ago
Yes, the right answer is 2 and 3.
(1)
Pragati said:   1 decade ago
Can anybody tell the solution using Venn diagram?
Anirban said:   1 decade ago
Conclusion II is also possible.

Conclusion II may or may not possible.

But how Conclusion IV is possible? I don't think so.
Shraddha said:   1 decade ago
2nd & 3rd conclusion is possible. But how 4th?
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