Railways PYQCBT 2 2017

RRB NTPC · Question 15

Study the following information carefully and answer the question given below it: In a class of 100 students, 63 like apples and 76 like oranges. How many of them like both apple and orange?

  1. 5

  2. 39

  3. 40

  4. 50

Show answer & explanation

Answer: (B) 39

Explanation

n(A ∩ O) = n(A) + n(O) − n(A ∪ O) = 63 + 76 − 100 = 39 students like both.