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Question How many sons does D have Statements I A's father...

This question belongs to Competitive Reasoning Data Sufficiency
Data Sufficiency
?

Question : How many sons does D have ?

Statements :
I. A's father has three children.
II. B is A's brother and son of D.

Answer & Solution
Correct Answer: Option D
From both I and II together, we can conclude that A and B are the children of D, but the sex of A and the third child of D is not known. So, both I and II together are also not sufficient to answer the question.
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