यदि \(U=\{1,2,3,4,5,6,7,8,9,10\}\) और \(A=\{2,5,8\}\) है, तो \(A^c\cup{5}\) में कितने तत्व होंगे?
If \(U=\{1,2,3,4,5,6,7,8,9,10\}\) and \(A=\{2,5,8\}\), how many elements are in \(A^c\cup{5}\)?
Explanation opens after your attempt
Correct Answer
A. (8)
Concept
\(A^c\) has (7) elements because (A) has (3) elements. Since (5) is not in \(A^c\), adding it makes the count (8).
Why this answer is correct
The correct answer is A. (8). \(A^c\) has (7) elements because (A) has (3) elements. Since (5) is not in \(A^c\), adding it makes the count (8).
Exam Tip
\(A^c\) में (7) तत्व हैं क्योंकि (A) में (3) तत्व हैं। (5) \(A^c\) में नहीं है, इसलिए जोड़ने पर संख्या (8) होगी।
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