यदि \(U=\{1,2,3,4,5,6,7,8\}\), \(A=\{1,2,3,4\}\) और \(B=\{3,4,5,6\}\), तो (n(P\(A'\cap B'\))) क्या है?
If \(U=\{1,2,3,4,5,6,7,8\}\), \(A=\{1,2,3,4\}\), and \(B=\{3,4,5,6\}\), then what is (n(P\(A'\cap B'\)))?
Explanation opens after your attempt
B. (4)
Concept
(A'\cap B'=\(A\cup B\)'={7,8}), so (n(P\(A'\cap B'\))=22=4). De Morgan's law saves time.
Why this answer is correct
The correct answer is B. (4). (A'\cap B'=\(A\cup B\)'={7,8}), so (n(P\(A'\cap B'\))=22=4). De Morgan's law saves time.
Exam Tip
(A'\cap B'=\(A\cup B\)'={7,8}), इसलिए (n(P\(A'\cap B'\))=22=4)। डी मॉर्गन नियम से समय बचता है।
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