यदि \(A=\{1,2,3,4\}\), तो (\mathcal{P}(A)) के कितने तत्वों में (1) नहीं होगा और (4) होगा?

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

Explanation opens after your attempt
Correct Answer

C. (4)

Step 1

Concept

(4) is fixed and (1) is excluded. The remaining (2,3) give \(2^2=4\) choices.

Step 2

Why this answer is correct

The correct answer is C. (4). (4) is fixed and (1) is excluded. The remaining (2,3) give \(2^2=4\) choices.

Step 3

Exam Tip

(4) निश्चित है और (1) नहीं लेना है। शेष (2,3) के लिए \(2^2=4\) विकल्प हैं।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{1,2,3,4\}\), तो (\mathcal{P}(A)) के कितने तत्वों में (1) नहीं होगा और (4) होगा? / If \(A=\{1,2,3,4\}\), how many elements of (\mathcal{P}(A)) do not contain (1) and contain (4)?

Correct Answer: C. (4). Explanation: (4) निश्चित है और (1) नहीं लेना है। शेष (2,3) के लिए \(2^2=4\) विकल्प हैं। / (4) is fixed and (1) is excluded. The remaining (2,3) give \(2^2=4\) choices.

Which concept should I revise for this Mathematics MCQ?

(4) is fixed and (1) is excluded. The remaining (2,3) give \(2^2=4\) choices.

What exam hint can help solve this Mathematics question?

(4) निश्चित है और (1) नहीं लेना है। शेष (2,3) के लिए \(2^2=4\) विकल्प हैं।