Couple in a Room
Suppose the following statements about three persons in a room are true.
Chandni, Sooraj and Tara are in a room. Nobody else is in the room. Chandni is looking at Sooraj. Sooraj is looking at Tara. Chandni is married. Tara is not married. A married person in the room is looking at an unmarried person.
Which of the following is necessarily true?
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1 solution
You can rename Chandni as C, Sooraj as S, and Tara as T. The description of where they are looking can be described as C -> S -> T where an arrow represents who someone is looking at. We know that C is married and T is not. We also know that a married person is looking at an unmarried person. That means there could be two different situations (where (m) is married and (n) is not married):
C(m) --> S(m) --> T(n) . Where S is the married one looking at T, the unmarried one.
or
C(m) --> S(n) --> T(n) . Where C is the married one looking at S, the unmarried one.
That means there is insufficient information to conclude if Sooraj is married or not because either situation would follow the rules.