UGC-NET | UGC NET CS 2015 Dec – II | Question 6

Which of the following arguments are valid ?

(a)“If Gora gets the job and works hard, then he will be promoted. If Gora gets promotion, then he will be happy. He will not be happy, therefore, either he will not get the job or he will not work hard”.

(b)“Either Puneet is not guilty or Pankaj is telling the truth. Pankaj is not telling the truth, therefore, Puneet is not guilty”. 

(c)If n is a real number such that n>1, then n²>1. Suppose that n²>1, then n>1.

(A)

(a) and (c)

(B)

(b) and (c)

(C)

(a), (b) and (c)

(D)

(a) and (b)

Answer: (D)
Explanation:

• First argument is a valid argument.
• Second argument is valid argument.
• Third argument is not a valid argument.
  

So, option (D) is correct.

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