In a school, there are five teachers A, B, C, D and E. A and B teach Hindi and English. C and B teach English and Geography. D and A teach Mathematics and Hindi. E and B teach History and French. Who teaches maximum number of subjects?
- (a) A
- (b) B ✓ UPSC's answer
- (c) D
- (d) E
Why the answer is (b)
• A and B teach Hindi and English, so A teaches Hindi and English, and B teaches Hindi and English.
• C and B teach English and Geography, so B adds Geography, and C teaches English and Geography.
• D and A teach Mathematics and Hindi, so A adds Mathematics, and D teaches Mathematics and Hindi.
• E and B teach History and French, so B adds History and French, and E teaches History and French.
• The subject counts are A = 3, B = 5, C = 2, D = 2, E = 2, so B teaches the maximum number of subjects, hence option (b).
Why the other options are wrong
- (a) A
- A teaches only Hindi, English and Mathematics, i.e. 3 subjects, not the maximum.
- (c) D
- D teaches only Mathematics and Hindi, i.e. 2 subjects, not the maximum.
- (d) E
- E teaches only History and French, i.e. 2 subjects, not the maximum.
Asked in the CSAT Paper II of the UPSC Civil Services Preliminary Examination 2017, held on 18 June 2017. Question and answer key: Union Public Service Commission. Explanation: UPSC Answer Check.