यदि \(A=\{2,5,8\}\) है तो (\mathcal{P}(A)) में कुल कितने उपसमुच्चय (5) को रखते हैं?

If \(A=\{2,5,8\}\), how many subsets in (\mathcal{P}(A)) contain (5)?

Explanation opens after your attempt
Correct Answer

C. (4)

Step 1

Concept

Keep (5) fixed and choose from the remaining (2) elements in \(2^2=4\) ways. So there are (4) such subsets.

Step 2

Why this answer is correct

The correct answer is C. (4). Keep (5) fixed and choose from the remaining (2) elements in \(2^2=4\) ways. So there are (4) such subsets.

Step 3

Exam Tip

(5) को स्थिर रखकर बाकी (2) तत्वों के लिए \(2^2=4\) विकल्प हैं। इसलिए ऐसे (4) उपसमुच्चय होंगे।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{2,5,8\}\) है तो (\mathcal{P}(A)) में कुल कितने उपसमुच्चय (5) को रखते हैं? / If \(A=\{2,5,8\}\), how many subsets in (\mathcal{P}(A)) contain (5)?

Correct Answer: C. (4). Explanation: (5) को स्थिर रखकर बाकी (2) तत्वों के लिए \(2^2=4\) विकल्प हैं। इसलिए ऐसे (4) उपसमुच्चय होंगे। / Keep (5) fixed and choose from the remaining (2) elements in \(2^2=4\) ways. So there are (4) such subsets.

Which concept should I revise for this Mathematics MCQ?

Keep (5) fixed and choose from the remaining (2) elements in \(2^2=4\) ways. So there are (4) such subsets.

What exam hint can help solve this Mathematics question?

(5) को स्थिर रखकर बाकी (2) तत्वों के लिए \(2^2=4\) विकल्प हैं। इसलिए ऐसे (4) उपसमुच्चय होंगे।