यदि \(U={1,2,3,\ldots,12}\) और \(A=\{3,6,9,12\}\) है, तो \(A^c\cup{6,12}\) में कितने तत्व होंगे?
If \(U={1,2,3,\ldots,12}\) and \(A=\{3,6,9,12\}\), how many elements are in \(A^c\cup{6,12}\)?
Explanation opens after your attempt
A. (10)
Concept
\(A^c\) has (8) elements, and (6,12) are not in it. Adding these two new elements gives (10) elements.
Why this answer is correct
The correct answer is A. (10). \(A^c\) has (8) elements, and (6,12) are not in it. Adding these two new elements gives (10) elements.
Exam Tip
\(A^c\) में (8) तत्व हैं और (6,12) इसमें नहीं हैं। इसलिए दो नए तत्व जोड़ने पर कुल (10) तत्व होंगे।
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