\(यदि (A={x:x\in\mathbb{N},2\le x\le6}) और (B={y:y\in\mathbb{N},y\) is odd\(,y<8}) हैं, तो (|A\times B|) क्या है\)?
\(If (A={x:x\in\mathbb{N},2\le x\le6}) and (B={y:y\in\mathbb{N},y\) is odd\(,y<8}), what is (|A\times B|)\)?
Explanation opens after your attempt
Correct Answer
B. (20)
Concept
Here \(A=\{2,3,4,5,6\}\) and \(B=\{1,3,5,7\}\), so \(|A\times B|=5\cdot4=20\). First count both sets.
Why this answer is correct
The correct answer is B. (20). Here \(A=\{2,3,4,5,6\}\) and \(B=\{1,3,5,7\}\), so \(|A\times B|=5\cdot4=20\). First count both sets.
Exam Tip
यहाँ \(A=\{2,3,4,5,6\}\) और \(B=\{1,3,5,7\}\), इसलिए \(|A\times B|=5\cdot4=20\)। पहले दोनों समुच्चयों की संख्या गिनें।
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