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
Correct Answer

B. (15)

Step 1

Concept

\(|A\times B|=6\), and choosing (2) elements gives \(\binom{6}{2}=15\). Exactly (2) elements means a combination.

Step 2

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.

Step 3

Exam Tip

\(|A\times B|=6\) और (2) अवयव चुनने के तरीके \(\binom{6}{2}=15\) हैं। ठीक (2) अवयव का अर्थ संयोजन है।

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Mathematics Answer, Explanation and Revision Hints

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?

Correct Answer: B. (15). Explanation: \(|A\times B|=6\) और (2) अवयव चुनने के तरीके \(\binom{6}{2}=15\) हैं। ठीक (2) अवयव का अर्थ संयोजन है। / \(|A\times B|=6\), and choosing (2) elements gives \(\binom{6}{2}=15\). Exactly (2) elements means a combination.

Which concept should I revise for this Mathematics MCQ?

\(|A\times B|=6\), and choosing (2) elements gives \(\binom{6}{2}=15\). Exactly (2) elements means a combination.

What exam hint can help solve this Mathematics question?

\(|A\times B|=6\) और (2) अवयव चुनने के तरीके \(\binom{6}{2}=15\) हैं। ठीक (2) अवयव का अर्थ संयोजन है।