यदि \(A=\{5\}\) और \(B=\{7,8\}\) है, तो \(A\times B\) में कितने क्रमित युग्म होंगे?

If \(A=\{5\}\) and \(B=\{7,8\}\), how many ordered pairs are in \(A\times B\)?

Explanation opens after your attempt
Correct Answer

B. (2) युग्म(2) pairs

Step 1

Concept

(n\(A\times B\)=n(A)n(B)), so \(1\times 2=2\). In exams, count elements first and then multiply.

Step 2

Why this answer is correct

The correct answer is B. (2) युग्म / (2) pairs. (n\(A\times B\)=n(A)n(B)), so \(1\times 2=2\). In exams, count elements first and then multiply.

Step 3

Exam Tip

(n\(A\times B\)=n(A)n(B)), इसलिए \(1\times 2=2\)। परीक्षा में पहले संख्या गिनें फिर गुणा करें।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{5\}\) और \(B=\{7,8\}\) है, तो \(A\times B\) में कितने क्रमित युग्म होंगे? / If \(A=\{5\}\) and \(B=\{7,8\}\), how many ordered pairs are in \(A\times B\)?

Correct Answer: B. (2) युग्म / (2) pairs. Explanation: (n\(A\times B\)=n(A)n(B)), इसलिए \(1\times 2=2\)। परीक्षा में पहले संख्या गिनें फिर गुणा करें। / (n\(A\times B\)=n(A)n(B)), so \(1\times 2=2\). In exams, count elements first and then multiply.

Which concept should I revise for this Mathematics MCQ?

(n\(A\times B\)=n(A)n(B)), so \(1\times 2=2\). In exams, count elements first and then multiply.

What exam hint can help solve this Mathematics question?

(n\(A\times B\)=n(A)n(B)), इसलिए \(1\times 2=2\)। परीक्षा में पहले संख्या गिनें फिर गुणा करें।