यदि \(U={1,2,3,\ldots,30}\) और (A) (2) या (3) से विभाज्य संख्याओं का समुच्चय है, तो (|A'|) क्या है?
If \(U={1,2,3,\ldots,30}\) and (A) is the set of numbers divisible by (2) or (3), what is (|A'|)?
Explanation opens after your attempt
A. (10)
Concept
Numbers divisible by (2) or (3) are (15+10-5=20). Hence 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). Hence the complement has (30-20=10) numbers.
Exam Tip
(2) या (3) से विभाज्य संख्याएँ (15+10-5=20) हैं। इसलिए पूरक में (30-20=10) संख्याएँ हैं।
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