यदि \(A\cup B'=U\), तो निम्न में से कौन सा कथन अवश्य सत्य है?
If \(A\cup B'=U\), which of the following statements must be true?
Explanation opens after your attempt
Correct Answer
A. \(B\subseteq A\)
Concept
Taking the complement of \(A\cup B'=U\) gives \(A'\cap B=\varnothing\). Therefore every element of (B) is in (A).
Why this answer is correct
The correct answer is A. \(B\subseteq A\). Taking the complement of \(A\cup B'=U\) gives \(A'\cap B=\varnothing\). Therefore every element of (B) is in (A).
Exam Tip
\(A\cup B'=U\) का पूरक लेने पर \(A'\cap B=\varnothing\) मिलता है। इसलिए (B) का हर सदस्य (A) में है।
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