यदि \(A=\{1,2,3,4\}\) है तो (\mathcal{P}(A)) में कितने उपसमुच्चय (2) को रखते और (3) को नहीं रखते?

If \(A=\{1,2,3,4\}\), how many subsets in (\mathcal{P}(A)) contain (2) and do not contain (3)?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

Taking (2) and not taking (3) are fixed. For remaining (1,4), there are \(2^2=4\) choices.

Step 2

Why this answer is correct

The correct answer is B. (4). Taking (2) and not taking (3) are fixed. For remaining (1,4), there are \(2^2=4\) choices.

Step 3

Exam Tip

(2) लेना और (3) न लेना तय है। बाकी (1,4) के लिए \(2^2=4\) विकल्प हैं।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{1,2,3,4\}\) है तो (\mathcal{P}(A)) में कितने उपसमुच्चय (2) को रखते और (3) को नहीं रखते? / If \(A=\{1,2,3,4\}\), how many subsets in (\mathcal{P}(A)) contain (2) and do not contain (3)?

Correct Answer: B. (4). Explanation: (2) लेना और (3) न लेना तय है। बाकी (1,4) के लिए \(2^2=4\) विकल्प हैं। / Taking (2) and not taking (3) are fixed. For remaining (1,4), there are \(2^2=4\) choices.

Which concept should I revise for this Mathematics MCQ?

Taking (2) and not taking (3) are fixed. For remaining (1,4), there are \(2^2=4\) choices.

What exam hint can help solve this Mathematics question?

(2) लेना और (3) न लेना तय है। बाकी (1,4) के लिए \(2^2=4\) विकल्प हैं।