यदि \(A=\{2,3,4,5\}\) और \(B=\{1,2,3,4,5\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें (b-a) सम है?

If \(A=\{2,3,4,5\}\) and \(B=\{1,2,3,4,5\}\), how many pairs ((a,b)) in \(A\times B\) have (b-a) even?

Explanation opens after your attempt
Correct Answer

C. (10)

Step 1

Concept

The difference is even when both have the same parity. The count is \(2\cdot2+2\cdot3=10\).

Step 2

Why this answer is correct

The correct answer is C. (10). The difference is even when both have the same parity. The count is \(2\cdot2+2\cdot3=10\).

Step 3

Exam Tip

अंतर सम तब होता है जब दोनों की समता समान हो। गिनती \(2\cdot2+2\cdot3=10\) है।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{2,3,4,5\}\) और \(B=\{1,2,3,4,5\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें (b-a) सम है? / If \(A=\{2,3,4,5\}\) and \(B=\{1,2,3,4,5\}\), how many pairs ((a,b)) in \(A\times B\) have (b-a) even?

Correct Answer: C. (10). Explanation: अंतर सम तब होता है जब दोनों की समता समान हो। गिनती \(2\cdot2+2\cdot3=10\) है। / The difference is even when both have the same parity. The count is \(2\cdot2+2\cdot3=10\).

Which concept should I revise for this Mathematics MCQ?

The difference is even when both have the same parity. The count is \(2\cdot2+2\cdot3=10\).

What exam hint can help solve this Mathematics question?

अंतर सम तब होता है जब दोनों की समता समान हो। गिनती \(2\cdot2+2\cdot3=10\) है।