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Railways PYQCBT 1 2016

RRB NTPC · Question 32

Consider the following information and answer questions based on it. Among 60 students, 12 like only algebra, 13 like only geometry, 10 like only trigonometry, 5 like both algebra and trigonometry, 8 like only physics, 5 like both physics and geometry and the remaining like both algebra and physics. The number of students who like physics but not geometry is

  1. 8
  2. 13
  3. 15
  4. 17
Show answer & explanation

Answer: (C) 15

Explanation

Students who like both algebra and physics = 60 − (12 + 13 + 10 + 5 + 8 + 5) = 7. Physics but not geometry = only physics + algebra and physics = 8 + 7 = 15.