If A and B are any two sets then what can be the minimum number of elements in `A nnB`?

If A and B are any two matrics then

If A and B be two sets containing 6 and 3 elements respectively, what can be the minimum number of elements in AuuB ? Also, find the maximum number of elements in AuuB .

If A and B are two sets, then A nn (A uu B) equals

Statement-1 If Sets A and B have three and six elements respectively, then the minimum number of elements in A uu B is 6. Statement-2 AnnB=3 .

If A and B are any two sets, prove that : A-B =A nn B^(c) .

If A and B are any two sets, prove that : (A-B) uu B =A uu B .