If it is false that 39 There is at least one octogenarian in the room 39 then which one of the follo...........

Logial Reasoning (CLAT) Statement - Conclusions

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If it is false that 'There is at least one octogenarian in the room', then which one of the following is probable?

No one in the room is an octogenarian.

All those who are in the room are octogenarians.

One person in the room is not an octogenarian.

Some people in the room are not octogenarians.

Explanation:

Let's take an example . Suppose there are 3 persons in a room . Ans I say that at least one is octogenarian Then possible cases are : (1) Only 1 person is octagerian (2) 2 are octagerian (3) all 3 are octagerian And now I say this statement is false .so all these cases will not hold. So only left case that no person is octagerian will hold.
Hence, option 1 is the correct answer.