यदि (n(A)=4) है तो (A) के उचित उपसमुच्चयों की संख्या कितनी होगी?
If (n(A)=4), how many proper subsets does (A) have?
Explanation opens after your attempt
B. (15)
Concept
Total subsets are \(2^4=16\) and a proper subset excludes (A) itself. Therefore the number is (15).
Why this answer is correct
The correct answer is B. (15). Total subsets are \(2^4=16\) and a proper subset excludes (A) itself. Therefore the number is (15).
Exam Tip
कुल उपसमुच्चय \(2^4=16\) हैं और उचित उपसमुच्चय में (A) स्वयं शामिल नहीं होता। इसलिए संख्या (15) है।
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