English and Logical Reasoning Prep Guide
- Exam
- English and Logical Reasoning Prep Guide
- Subject
- Logical Reasoning
- Chapter
- Logical Deduction
English and Logical Reasoning Prep Guide · Logical Reasoning · Logical Deduction
Directions : In question, some statements are given, followed by...
Directions : In question, some statements are given, followed by two conclusions I and II. You have to consider the statements to be true, even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow from the given statements. Indicate your answer.
Statements :&
All rivers are seas.
All lakes are seas.
Some seas are not oceans.&
Conclusions :&
I. Some rivers are not lakes.&
II. Some oceans may not be seas.
Options
- AIf only conclusion I follow
- BIf only conclusion II follow
- CIf neither conclusion I nor conclusion II follows
- DIf both the conclusions follow
Correct answer
B. If only conclusion II follow
Step-by-step solution
Checking Conclusion I : Some rivers are not lakes.&
Here, neither S1 nor S2 is a negative statement, a negative conclusion between the classes of 'rivers' and 'lakes' is not possible. C1, hence, doesn't follow.
Checking Conclusion II : Some oceans may not be seas.
In S3 it's given that 'Some seas are not oceans'. Here, we are not sure of the elements of the class 'oceans'. Clearly, we can say that 'Some oceans may not be seas'. C2, hence, follows.
Option B is hence the correct answer.