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Railways PYQCBT 2 2017

RRB NTPC · Question 89

In a group of 85 persons, 45 read novels and 37 read poems and 8 do not read either novels or poems. Find the number of persons who read both novels and poems.

  1. 6

  2. 7

  3. 8

  4. 5

Show answer & explanation

Answer: (D) 5

Explanation

n(N ∩ P) = n(N) + n(P) − n(N ∪ P) = 45 + 37 − 77 = 5.