The question below is followed by two statements numbered I and II. Decide whether the data given in the statements are sufficient to answer the question.
Sam is a man. Is Sam an uncle of Rhea?
I. Sam is the brother of Rhea’s father.
II. Sam’s father is one of Rhea’s grandfathers, and Sam is not Rhea’s father.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Either statement I alone or statement II alone is sufficient.
An uncle is a brother of one’s father or mother. A statement is sufficient if it gives a definite yes or a definite no.
Statement I alone:
Sam is the brother of Rhea’s father, so Sam is Rhea’s uncle: a definite yes, sufficient
Statement II alone:
If Sam’s father is Rhea’s father’s father, Sam is Rhea’s father or his brother; he is not her father, so he is her father’s brother
If Sam’s father is Rhea’s mother’s father, Sam is her mother’s brother
In both cases Sam is Rhea’s uncle: a definite yes, sufficient