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

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

Explanation opens after your attempt
Correct Answer

B. (10)

Step 1

Concept

The sum is divisible by (2) when both have the same parity. The count is \(3\cdot2+2\cdot2=10\).

Step 2

Why this answer is correct

The correct answer is B. (10). The sum is divisible by (2) when both have the same parity. The count is \(3\cdot2+2\cdot2=10\).

Step 3

Exam Tip

योग (2) से विभाज्य तब है जब दोनों की समता समान हो। गिनती \(3\cdot2+2\cdot2=10\) है।

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Mathematics Answer, Explanation and Revision Hints

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

Correct Answer: B. (10). Explanation: योग (2) से विभाज्य तब है जब दोनों की समता समान हो। गिनती \(3\cdot2+2\cdot2=10\) है। / The sum is divisible by (2) when both have the same parity. The count is \(3\cdot2+2\cdot2=10\).

Which concept should I revise for this Mathematics MCQ?

The sum is divisible by (2) when both have the same parity. The count is \(3\cdot2+2\cdot2=10\).

What exam hint can help solve this Mathematics question?

योग (2) से विभाज्य तब है जब दोनों की समता समान हो। गिनती \(3\cdot2+2\cdot2=10\) है।