\(यदि (U={x:x\in\mathbb{N},1\le x\le 30}) और (A={x:x\) 2 या 3 से विभाज्य है\(}) है, तो (n(A^c)) कितना होगा\)?
\(If (U={x:x\in\mathbb{N},1\le x\le 30}) and (A={x:x\) is divisible by 2 or \(3}), what is (n(A^c))\)?
Explanation opens after your attempt
A. (10)
Concept
Numbers divisible by (2) or (3) are (15+10-5=20). So the complement has (30-20=10) numbers.
Why this answer is correct
The correct answer is A. (10). Numbers divisible by (2) or (3) are (15+10-5=20). So the complement has (30-20=10) numbers.
Exam Tip
(2) या (3) से विभाज्य संख्याएं (15+10-5=20) हैं। इसलिए पूरक में (30-20=10) संख्याएं होंगी।
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