यदि \(A=\{1,2,3,4\}\) और \(R=\{(a,b):a+b=7\}\) है, तो कौन-सा pair (R) में है?
If \(A=\{1,2,3,4\}\) and \(R=\{(a,b):a+b=7\}\), which pair is in (R)?
Explanation opens after your attempt
B. ( (3,4) )
Concept
Since (3+4=7), \((3,4)\in R\). In such questions, test the pair in the condition.
Why this answer is correct
The correct answer is B. ( (3,4) ). Since (3+4=7), \((3,4)\in R\). In such questions, test the pair in the condition.
Exam Tip
क्योंकि (3+4=7), इसलिए \((3,4)\in R\) है। ऐसे प्रश्नों में pair को condition में रखकर जांचें।
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