यदि \(A={x:x\in\mathbb{N},;x\le 25,;x is odd}\) और (B={x:x\in\mathbb{N},;x\le 25,;\(3\mid x}), तो (|A\cap B|) कितना है\)?
If \(A={x:x\in\mathbb{N},;x\le 25,;x is odd}\) and (B={x:x\in\mathbb{N},;x\le 25,;\(3\mid x}), what is (|A\cap B|)\)?
Explanation opens after your attempt
Correct Answer
A. (5)
Concept
Multiples of (3) up to (25) are (3,6,9,12,15,18,21,24). The odd ones are (3,9,15,21), so the count is (4).
Why this answer is correct
The correct answer is A. (5). Multiples of (3) up to (25) are (3,6,9,12,15,18,21,24). The odd ones are (3,9,15,21), so the count is (4).
Exam Tip
(25) तक (3) के गुणज (3,6,9,12,15,18,21,24) हैं। इनमें विषम (3,9,15,21,25) नहीं, बल्कि (3,9,15,21) और (?) नहीं; कुल (4) है।
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