यदि \(A=\{2,5\}\) और \(B=\{7,8\}\) है, तो \(A\times B\) में पहले घटक (2) वाले कितने युग्म होंगे?

If \(A=\{2,5\}\) and \(B=\{7,8\}\), how many pairs in \(A\times B\) have first component (2)?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

The first component (2) is fixed and the second component is chosen from the (2) elements of (B). Therefore, there are (2) such pairs.

Step 2

Why this answer is correct

The correct answer is B. (2). The first component (2) is fixed and the second component is chosen from the (2) elements of (B). Therefore, there are (2) such pairs.

Step 3

Exam Tip

पहला घटक (2) तय है और दूसरा घटक (B) के (2) तत्वों में से चुना जाएगा। इसलिए ऐसे (2) युग्म होंगे।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{2,5\}\) और \(B=\{7,8\}\) है, तो \(A\times B\) में पहले घटक (2) वाले कितने युग्म होंगे? / If \(A=\{2,5\}\) and \(B=\{7,8\}\), how many pairs in \(A\times B\) have first component (2)?

Correct Answer: B. (2). Explanation: पहला घटक (2) तय है और दूसरा घटक (B) के (2) तत्वों में से चुना जाएगा। इसलिए ऐसे (2) युग्म होंगे। / The first component (2) is fixed and the second component is chosen from the (2) elements of (B). Therefore, there are (2) such pairs.

Which concept should I revise for this Mathematics MCQ?

The first component (2) is fixed and the second component is chosen from the (2) elements of (B). Therefore, there are (2) such pairs.

What exam hint can help solve this Mathematics question?

पहला घटक (2) तय है और दूसरा घटक (B) के (2) तत्वों में से चुना जाएगा। इसलिए ऐसे (2) युग्म होंगे।