UPSKILL MATH PLUS
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Learn more1. If \(U = \{x : x \in \mathbb{W}\) and \(x < 10\}\), \(P = \{0, 2, 3, 4, 7\}\) and \(Q = \{1, 2, 5, 7, 8, 9\}\), then \(n(P \cup Q)\) \(=\) _______________.
2. If \(A\) and \(B\) are two finite sets, then \(n(A \cap B)\) \(=\) ________________.
3. If \(A\) and \(B\) are disjoint sets, then \(n(A \cup B)\) \(=\) _______________.
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