NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2016

RRB NTPC · Question 66

Read the statements given below and derive the conclusion. Statements: No window is monkey. All the monkeys are cats. Conclusions: 1. No window is cat. 2. No cat is window 3. Some cats are monkeys. 4. All cats are monkeys.

  1. Only (2) and (4)

  2. Only (1) and (3)

  3. Only (3) and (4)

  4. Only (3)

Show answer & explanation

Answer: (D) Only (3)

Explanation

All monkeys are cats, so some cats are monkeys (3 follows). Windows lie outside monkeys, but cats that are not monkeys could be windows, so 1 and 2 fail; 4 reverses 'all monkeys are cats'. Only (3).