यदि \(A=\{a,b,c,d,e\}\) है तो सभी उपसमुच्चयों में अवयव (c) कितनी बार आएगा?
If \(A=\{a,b,c,d,e\}\) then how many times will element (c) appear in all subsets?
Explanation opens after your attempt
B. (16)
Concept
In a five element set, any fixed element appears in \(2^4=16\) subsets. Fix one element and let the other four vary freely.
Why this answer is correct
The correct answer is B. (16). In a five element set, any fixed element appears in \(2^4=16\) subsets. Fix one element and let the other four vary freely.
Exam Tip
पांच अवयवों वाले समुच्चय में कोई निश्चित अवयव \(2^{4}=16\) उपसमुच्चयों में आता है। एक अवयव निश्चित रखकर बाकी चार को स्वतंत्र मानें।
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