यदि (A) में (2) सदस्य हैं और (B) में (3) सदस्य हैं तथा \(A\subset B\), तो (\mathcal{P}(B)-\mathcal{P}(A)) में कितने सदस्य होंगे?
If (A) has (2) elements and (B) has (3) elements with \(A\subset B\), how many elements are in (\mathcal{P}(B)-\mathcal{P}(A))?
Explanation opens after your attempt
B. (4)
Concept
(\mathcal{P}(B)) has (8) elements and (\mathcal{P}(A)) has (4). The difference contains (8-4=4) elements.
Why this answer is correct
The correct answer is B. (4). (\mathcal{P}(B)) has (8) elements and (\mathcal{P}(A)) has (4). The difference contains (8-4=4) elements.
Exam Tip
(\mathcal{P}(B)) में (8) और (\mathcal{P}(A)) में (4) सदस्य हैं। अंतर में (8-4=4) सदस्य होंगे।
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