यदि \(A=\{a,b,c,d,e\}\), तो ऐसे उपसमुच्चयों की संख्या कितनी है जिनमें (a) और (b) दोनों हों?
If \(A=\{a,b,c,d,e\}\), how many subsets contain both (a) and (b)?
Explanation opens after your attempt
B. 8
Concept
(a) and (b) are fixed, while the other 3 elements are optional. Hence \(2^3=8\) subsets.
Why this answer is correct
The correct answer is B. 8. (a) and (b) are fixed, while the other 3 elements are optional. Hence \(2^3=8\) subsets.
Exam Tip
(a) और (b) निश्चित हैं, बाकी 3 अवयव स्वतंत्र हैं। इसलिए \(2^3=8\) उपसमुच्चय होंगे।
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