यदि \(A=\{1,2,3\}\) और \(B=\{4,5\}\) है, तो \(A\times B\) के ऐसे उपसमुच्चयों की संख्या क्या है जिनमें ठीक (2) क्रमबद्ध युग्म हों?
If \(A=\{1,2,3\}\) and \(B=\{4,5\}\), what is the number of subsets of \(A\times B\) having exactly (2) ordered pairs?
Explanation opens after your attempt
C. (15)
Concept
Here (n\(A\times B\)=3\cdot2=6). The number of ways to choose exactly (2) pairs is \(\binom{6}{2}=15\).
Why this answer is correct
The correct answer is C. (15). Here (n\(A\times B\)=3\cdot2=6). The number of ways to choose exactly (2) pairs is \(\binom{6}{2}=15\).
Exam Tip
यहां (n\(A\times B\)=3\cdot2=6)। ठीक (2) युग्म चुनने की संख्या \(\binom{6}{2}=15\) है।
Login to save your score, XP, coins and progress.
