If \( A \) and \( B \) are two sets such that \( n(A)=7, n(B)=6 \) and \( n(A \cap B) \neq \phi ... VIDEO
If \( A \) and \( B \) are two sets such that \( n(A)=7, n(B)=6 \) and \( n(A \cap B) \neq \phi \) The least possible value of \( n(A \Delta B) \), is
(A) 1
(B) 7
(C) 6
(D) 13
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