The sets \(\xi\), \(P\) and \(Q\) satisfy the conditions \(n(\xi)=50\), \(n(P)=10\) and \(n(Q)=38\). Find the smallest possible value of \(n((P\cup Q)^{\prime})\).[1]
On the Venn diagram, shade the region which represents \((X\cup Y)^{\prime}\).[1]
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Answer:(a) \(2\) (b) The region outside both \(X\) and \(Y\).