यदि \(A=\{10,20,30\}\) है तो (\mathcal{P}(A)) में कौन सा अवश्य होगा?

If \(A=\{10,20,30\}\), which one must be in (\mathcal{P}(A))?

Explanation opens after your attempt
Correct Answer

B. ({20})

Step 1

Concept

({20}) is a subset of (A), so it will be in (\mathcal{P}(A)). Do not treat direct (20) as an element of the power set.

Step 2

Why this answer is correct

The correct answer is B. ({20}). ({20}) is a subset of (A), so it will be in (\mathcal{P}(A)). Do not treat direct (20) as an element of the power set.

Step 3

Exam Tip

({20}) (A) का एक उपसमुच्चय है इसलिए यह (\mathcal{P}(A)) में होगा। सीधे (20) को घात समुच्चय का तत्व न समझें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{10,20,30\}\) है तो (\mathcal{P}(A)) में कौन सा अवश्य होगा? / If \(A=\{10,20,30\}\), which one must be in (\mathcal{P}(A))?

Correct Answer: B. ({20}). Explanation: ({20}) (A) का एक उपसमुच्चय है इसलिए यह (\mathcal{P}(A)) में होगा। सीधे (20) को घात समुच्चय का तत्व न समझें। / ({20}) is a subset of (A), so it will be in (\mathcal{P}(A)). Do not treat direct (20) as an element of the power set.

Which concept should I revise for this Mathematics MCQ?

({20}) is a subset of (A), so it will be in (\mathcal{P}(A)). Do not treat direct (20) as an element of the power set.

What exam hint can help solve this Mathematics question?

({20}) (A) का एक उपसमुच्चय है इसलिए यह (\mathcal{P}(A)) में होगा। सीधे (20) को घात समुच्चय का तत्व न समझें।