यदि \(A=\{a,b,c\}\) है तो (\mathcal{P}(A)) में (a) को न रखने वाले उपसमुच्चयों की संख्या कितनी है?
If \(A=\{a,b,c\}\), how many subsets in (\mathcal{P}(A)) do not contain (a)?
Explanation opens after your attempt
C. (4)
Concept
Keep (a) out and (b,c) each have two choices included or not. The number is \(2^2=4\).
Why this answer is correct
The correct answer is C. (4). Keep (a) out and (b,c) each have two choices included or not. The number is \(2^2=4\).
Exam Tip
(a) को बाहर रखें और (b,c) के लिए शामिल या न शामिल दो विकल्प होंगे। संख्या \(2^2=4\) है।
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