यदि \(A=\{1,2,3,4\}\) है तो (\mathcal{P}(A)) में कितने उपसमुच्चय (1) को रखते और (4) को नहीं रखते?
If \(A=\{1,2,3,4\}\), how many subsets in (\mathcal{P}(A)) contain (1) and do not contain (4)?
Explanation opens after your attempt
B. (4)
Concept
Keeping (1) and excluding (4) are fixed. For remaining (2,3), there are \(2^2=4\) choices.
Why this answer is correct
The correct answer is B. (4). Keeping (1) and excluding (4) are fixed. For remaining (2,3), there are \(2^2=4\) choices.
Exam Tip
(1) को रखना और (4) को हटाना तय है। बाकी (2,3) के लिए \(2^2=4\) विकल्प हैं।
Login to save your score, XP, coins and progress.
