यदि \(U=\{3,6,9,12\}\) और (A=U) है तो (A') में कितने तत्व हैं?
If \(U=\{3,6,9,12\}\) and (A=U), how many elements are in (A')?
Explanation opens after your attempt
A. (0)
Concept
When (A=U), no element remains outside (A) in (U). Therefore (A') is empty.
Why this answer is correct
The correct answer is A. (0). When (A=U), no element remains outside (A) in (U). Therefore (A') is empty.
Exam Tip
जब (A=U) होता है तो (U) में (A) से बाहर कोई तत्व नहीं बचता। इसलिए (A') रिक्त है।
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