यदि \(A=\{p,q,r\}\) है, तो (\mathcal{P}(A)) में दो-सदस्यीय उपसमुच्चयों की संख्या कितनी है?
If \(A=\{p,q,r\}\), how many two-element subsets are in (\mathcal{P}(A))?
Explanation opens after your attempt
Correct Answer
B. (3)
Concept
The number of two-element subsets is \(\binom{3}{2}=3\). In exams, use combinations for fixed-size subsets.
Why this answer is correct
The correct answer is B. (3). The number of two-element subsets is \(\binom{3}{2}=3\). In exams, use combinations for fixed-size subsets.
Exam Tip
दो-सदस्यीय subsets की संख्या \(\binom{3}{2}=3\) है। परीक्षा में fixed size subsets के लिए combination लगाएं।
Login to save your score, XP, coins and progress.