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Discussion

In a school, there are five teachers A, B, C, D and E, A and B teach Hindi and English. C and B 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
  • C.D
  • D.E

Answer: B

The teacher with the most subjects is B.

Collect each teacher's subjects:

  • A: Hindi, English, Mathematics (3).
  • B: Hindi, English, Geography, History, French (5).
  • C: English, Geography (2).
  • D: Mathematics, Hindi (2).
  • E: History, French (2).

B appears in three of the four pairs, which is why B teaches the most.

Note that each sentence names a pair of teachers and a pair of subjects, so a teacher named in more sentences picks up more subjects.

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