UPSC Prelims 2016 · CSAT
Question 18: Logical Reasoning and Mental Ability
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. Who is the lawyer ?
AnswerUPSC’s answer is (b).
The jobs are held by Q, R and T only, because P and S are students. Q is neither doctor nor artist, so Q must be the lawyer. R is not the doctor, so R is the artist and T is the doctor. Remember: when one person is excluded from two of the three jobs, the third job is theirs.
Why each option is right or wrong
- (a) P is a student with no profession.
- (b) Right: Q cannot be doctor or artist, so Q is the lawyer.
- (c) R is the artist, as R cannot be the doctor.
- (d) S is a student with no profession.
Answer: UPSC’s key. Explanation: written by UPSC Grade, not by UPSC.
Source: UPSC, Civil Services (Preliminary) Examination 2016, General Studies Paper II (CSAT), Series A. The paper on upsc.gov.in.