Ononot — If A has n(A) = 5 elements and B has n(B) = 4 elements, what

Set Theorymedium

0:00.0

If $A$ has $n(A) = 5$ elements and $B$ has $n(B) = 4$ elements, what is the maximum number of elements in $A \cup B$ and the minimum number of elements in $A \cap B$ ?