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
C. (4)
Concept
(4) is fixed and (1) is excluded. The remaining (2,3) give \(2^2=4\) choices.
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.
Exam Tip
(4) निश्चित है और (1) नहीं लेना है। शेष (2,3) के लिए \(2^2=4\) विकल्प हैं।
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