यदि \(A=\{1,2,3,4,5,6\}\) है, तो (A) के ऐसे उपसमुच्चयों की संख्या कितनी है जिनमें (2) और (5) दोनों हों?
If \(A=\{1,2,3,4,5,6\}\), how many subsets of (A) contain both (2) and (5)?
Explanation opens after your attempt
Correct Answer
B. (16)
Concept
Keeping (2) and (5) is fixed, and the remaining (4) elements are free. Therefore the number of subsets is \(2^4=16\).
Why this answer is correct
The correct answer is B. (16). Keeping (2) and (5) is fixed, and the remaining (4) elements are free. Therefore the number of subsets is \(2^4=16\).
Exam Tip
(2) और (5) को रखना निश्चित है, बाकी (4) तत्व स्वतंत्र हैं। इसलिए उपसमुच्चय \(2^4=16\) होंगे।
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