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If P = {3x|x ∈N,x ≤ 50}, Q = {5x|x ∈N, x ≤ 30}, then n(P ∩ Q) =…………….. A) 5 B) 8 C) 2D) 15 |
Answer» Correct option is (C) 2 \(P=\{3x|x\in N,x\leq50\}\) \(\Rightarrow P=\{3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48\}\) And \(Q=\{5x|x\in N,x\leq30\}\) \(\Rightarrow Q=\{5,10,15,20,25,30\}\) \(\therefore\) \(P\cap Q=\{15,30\}\) \(\therefore\) \(n(P\cap Q)=2\) Correct option is C) 2 |
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