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Railways PYQCBT 2 2017

RRB NTPC · Question 63

In a class of 25 students of Mathematics and Computer Science, 12 students have taken Mathematics. Out of this, 8 have taken Mathematics but not Computer Science. What is the number of students who have taken Computer Science but not Mathematics?

  1. 13

  2. 4

  3. 8

  4. 12

Show answer & explanation

Answer: (A) 13

Explanation

All 25 took at least one subject. Those who did not take Mathematics = 25 − 12 = 13; they took only Computer Science.