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
Correct Answer

C. (15)

Step 1

Concept

Here (n\(A\times B\)=3\cdot2=6). The number of ways to choose exactly (2) pairs is \(\binom{6}{2}=15\).

Step 2

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 \(\binom{6}{2}=15\).

Step 3

Exam Tip

यहां (n\(A\times B\)=3\cdot2=6)। ठीक (2) युग्म चुनने की संख्या \(\binom{6}{2}=15\) है।

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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?

Correct Answer: C. (15). Explanation: यहां (n\(A\times B\)=3\cdot2=6)। ठीक (2) युग्म चुनने की संख्या \(\binom{6}{2}=15\) है। / Here (n\(A\times B\)=3\cdot2=6). The number of ways to choose exactly (2) pairs is \(\binom{6}{2}=15\).

Which concept should I revise for this Mathematics MCQ?

Here (n\(A\times B\)=3\cdot2=6). The number of ways to choose exactly (2) pairs is \(\binom{6}{2}=15\).

What exam hint can help solve this Mathematics question?

यहां (n\(A\times B\)=3\cdot2=6)। ठीक (2) युग्म चुनने की संख्या \(\binom{6}{2}=15\) है।