If X and Y are two sets such that X `uu`Y has 50 elements, X has 28 elements and Y has 32 elements, how many elements does X `nn`Y have?

Explanation

To find the number of elements in the intersection of sets \(X\) and \(Y\), we can use the formula for the union of two sets:

\[ |X \cup Y| = |X| + |Y| - |X \cap Y| \]

Where:
- \(|X \cup Y|\) is the number of elements in the union of sets \(X\) and \(Y\).
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