यदि \(A=\{1,2,3,4,5\}\) है, तो (2) को शामिल करने और (4) को शामिल न करने वाले उपसमुच्चयों की संख्या कितनी है?
If \(A=\{1,2,3,4,5\}\), how many subsets contain (2) and do not contain (4)?
Explanation opens after your attempt
B. (8)
Concept
Element (2) is fixed, (4) is excluded, and (1,3,5) are free. Hence \(2^3=8\) subsets are possible.
Why this answer is correct
The correct answer is B. (8). Element (2) is fixed, (4) is excluded, and (1,3,5) are free. Hence \(2^3=8\) subsets are possible.
Exam Tip
(2) निश्चित है, (4) बाहर है और (1,3,5) स्वतंत्र हैं। इसलिए \(2^3=8\) उपसमुच्चय बनेंगे।
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