MH SET Exam 16 Apr 2017 Paper

Question : 27 of 60

Marks: +1, -0

In an arbitrary group of six people, which of the following situations is impossible?

At least five of them known each other and two of them do not know each other.
At least four of them known each other and three of them do not know each other.
No three of them know each other and no three of them unknown to each other.
No four of them are unknown to each other and there is a person known to every other.

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