For two sets if $n (A) = 4$ and $n (B) = 3$ then find the number of elements if $A Δ B$ .

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Solution

Given two sets if $n (A) = 4$ and $n (B) = 3$ .
Now we have,
$A Δ B$
$= (A - B) \cup (B - A)$ .
Since $A, B$ are not given explicitly so it is not possible to determine $n (A Δ B)$ .

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