There are five persons in a group — P, Q, R, S and T. The group has one doctor, one lawyer and one artist. P and S are unmarried students. T is a man married to one of the group members. Q is the brother of P and is neither doctor nor artist. R is not doctor.

Solution: P and S are unmarried students (hence not professionals), T a married man (so there is a female in this group), Q is brother of P, R is not a doctor. Q is neither a doctor nor an artist, so he must be a lawyer. R must be an Artist, so T should be a doctor (because P and S are students).