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Railways PYQCBT 1 2020

RRB NTPC · Question 89

Select the ordered pair of statements which are logically consistent with the main statement. Main Statement: Whenever Sakshi hears it's someone's birthday, she orders a cake. A. Sakshi heard of someone's birthday. B. Sakshi did not hear of someone's birthday. C. Sakshi ordered a cake. D. Sakshi did not ordered a cake.

  1. DB

  2. BD

  3. AB

  4. CA

Show answer & explanation

Answer: (A) DB

Explanation

'If she hears, she orders' is consistent with: she did not order a cake, so she did not hear of a birthday (D then B). A followed by B, or C followed by A, are not valid inferences.