Question

find (AUB), given that n(A)=4, n(B) =3, and n(A n B)=2

Answer 1

you have formula to find it out, it say
\[n(A\cup B)= n(A)+n(B) -n(A\cap B)\]
just plug numbers in

Answer 2

@Loser66 thank you

Answer 3

yw