यदि \(A=\{1,2\}\) और \(B=\{3,4,5\}\), तो \(A\times B\) के कितने उपसमुच्चय ठीक (2) अवयवों वाले हैं?
If \(A=\{1,2\}\) and \(B=\{3,4,5\}\), how many subsets of \(A\times B\) have exactly (2) elements?
Explanation opens after your attempt
B. (15)
Concept
\(|A\times B|=6\), and choosing (2) elements gives \(\binom{6}{2}=15\). Exactly (2) elements means a combination.
Why this answer is correct
The correct answer is B. (15). \(|A\times B|=6\), and choosing (2) elements gives \(\binom{6}{2}=15\). Exactly (2) elements means a combination.
Exam Tip
\(|A\times B|=6\) और (2) अवयव चुनने के तरीके \(\binom{6}{2}=15\) हैं। ठीक (2) अवयव का अर्थ संयोजन है।
Login to save your score, XP, coins and progress.
