यदि \(A=\{0,1,2,3,4\}\) और \(B=\{0,1,2,3\}\) हैं, तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें (a+b) सम है?
If \(A=\{0,1,2,3,4\}\) and \(B=\{0,1,2,3\}\), how many pairs ((a,b)) in \(A\times B\) have (a+b) even?
Explanation opens after your attempt
B. (10)
Concept
The sum is even when both components have the same parity. The count is \(3\cdot2+2\cdot2=10\).
Why this answer is correct
The correct answer is B. (10). The sum is even when both components have the same parity. The count is \(3\cdot2+2\cdot2=10\).
Exam Tip
योग सम तब होता है जब दोनों अवयवों की समता समान हो। गिनती \(3\cdot2+2\cdot2=10\) है।
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