यदि \(A=\{1,2,3\}\) और \(B=\{1,2,3\}\), तो \(A\times B\) में कितने युग्म ((a,b)) ऐसे हैं जिनमें \(a+b\ge5\) है?
If \(A=\{1,2,3\}\) and \(B=\{1,2,3\}\), how many pairs ((a,b)) in \(A\times B\) satisfy \(a+b\ge5\)?
Explanation opens after your attempt
B. (3)
Concept
The pairs with sum (5) or more are ((2,3),(3,2),(3,3)), totaling (3). Include equality when the condition has a boundary.
Why this answer is correct
The correct answer is B. (3). The pairs with sum (5) or more are ((2,3),(3,2),(3,3)), totaling (3). Include equality when the condition has a boundary.
Exam Tip
योग (5) या अधिक के युग्म ((2,3),(3,2),(3,3)) हैं, कुल (3)। सीमा सहित शर्त में बराबरी भी गिनें।
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