Consider the Question and two Statements given below: Question: Is Z brother of X? Statement-1: X is a…
Consider the Question and two Statements given below:
Question: Is Z brother of X?
Statement-1: X is a brother of Y and Y is a brother of Z.
Statement-2: X, Y and Z are siblings.
Which one of the following is correct in respect of the Question and the Statements?
Statement-1 alone is sufficient to answer the Question
Statement-2 alone is sufficient to answer the Question
Both Statement-1 and Statement-2 are sufficient to answer the Question
Both Statement-1 and Statement-2 are not sufficient to answer the Question
Solution
Statement 1 establishes X and Y are brothers and Y and Z are related, but the gender of Z is not known, so Z could be brother or sister of X. Statement 2 says they are siblings but again does not give Z's gender. Even combining the two, Z's gender remains unknown, so the question cannot be answered.