If X and Y are two sets such that n(X)=17, n(Y)=23 and n(X∪Y)=38, find n(X∩Y).

If X and Y are two sets such that n(X)=17, n(Y)=23 and n(X∪Y)=38, fi

1.	If X and Y are two sets such that n(X)=17, n(Y)=23 and n(X∪Y)=38, find n(X∩Y).
Answer» If $X$ and $Y$ are two sets such that $n (X) = 17, n (Y) = 23$ and $n (X \cup Y) = 38$ , find $n (X \cap Y)$ .