यदि \(U=\{1,2,3,4,5,6,7\}\), \(A=\{1,4,7\}\), तो \(A^{c}\cup A\) में कितने अवयव हैं?

If \(U=\{1,2,3,4,5,6,7\}\), \(A=\{1,4,7\}\), how many elements are in \(A^{c}\cup A\)?

Explanation opens after your attempt
Correct Answer

C. (7)

Step 1

Concept

\(A^{c}\cup A=U\), so it has (7) elements. Using the identity directly saves time.

Step 2

Why this answer is correct

The correct answer is C. (7). \(A^{c}\cup A=U\), so it has (7) elements. Using the identity directly saves time.

Step 3

Exam Tip

\(A^{c}\cup A=U\), इसलिए इसमें (7) अवयव हैं। सर्वसमिका को सीधे उपयोग करने से समय बचता है।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(U=\{1,2,3,4,5,6,7\}\), \(A=\{1,4,7\}\), तो \(A^{c}\cup A\) में कितने अवयव हैं? / If \(U=\{1,2,3,4,5,6,7\}\), \(A=\{1,4,7\}\), how many elements are in \(A^{c}\cup A\)?

Correct Answer: C. (7). Explanation: \(A^{c}\cup A=U\), इसलिए इसमें (7) अवयव हैं। सर्वसमिका को सीधे उपयोग करने से समय बचता है। / \(A^{c}\cup A=U\), so it has (7) elements. Using the identity directly saves time.

Which concept should I revise for this Mathematics MCQ?

\(A^{c}\cup A=U\), so it has (7) elements. Using the identity directly saves time.

What exam hint can help solve this Mathematics question?

\(A^{c}\cup A=U\), इसलिए इसमें (7) अवयव हैं। सर्वसमिका को सीधे उपयोग करने से समय बचता है।