If D is the brother of B, how B is related to C? To answer this question which of the statements is/are necessary?The son of D is the grandson of C.B is the sister of D.
Question
If D is the brother of B, how B is related to C? To answer this question which of the statements is/are necessary?The son of D is the grandson of C.B is the sister of D.
Solution
To answer the question "how B is related to C?", we need to know the relationship between B and C directly or indirectly.
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The statement "The son of D is the grandson of C" implies that D is the son of C. Since D is the brother of B, this means B is also a child of C. So, this statement is necessary to answer the question.
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The statement "B is the sister of D" is not necessary to answer the question. We already know from the question that D is the brother of B, which means they are siblings. Knowing the gender of B does not help us determine B's relationship to C.
So, only the first statement is necessary to answer the question.
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