Question 47

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

Statements:
No 90s are 80s.
Some 90s are 40s.
All 80s are 70s.

Conclusions:
I. All 80s being 40s is a possibility.
II. Some 70s are not 90s.

Solution

Conclusion: I. All 80s being 40s is a possibility.

The above-given possibility will be true. It is given below in the possible venn diagram. So the given conclusion follows.

Conclusion: II. Some 70s are not 90s.

Here some part of 70s which is 80s is not 90s. So the given conclusion follows.

Hence both conclusions I and II follow.


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