यदि \(U={1,2,\ldots,60}\), (A) (3) के गुणजों का समुच्चय है, (B) (4) के गुणजों का समुच्चय है और (C) (5) के गुणजों का समुच्चय है, तो (|\(A\cup B\cup C\)'|) कितना है?
If \(U={1,2,\ldots,60}\), (A) is the set of multiples of (3), (B) is the set of multiples of (4), and (C) is the set of multiples of (5), what is (|\(A\cup B\cup C\)'|)?
Explanation opens after your attempt
C. (24)
Concept
By inclusion-exclusion, \(|A\cup B\cup C|=20+15+12-5-4-3+1=36\). So the complement has (60-36=24) elements.
Why this answer is correct
The correct answer is C. (24). By inclusion-exclusion, \(|A\cup B\cup C|=20+15+12-5-4-3+1=36\). So the complement has (60-36=24) elements.
Exam Tip
समावेशन-बहिष्करण से \(|A\cup B\cup C|=20+15+12-5-4-3+1=36\)। इसलिए पूरक में (60-36=24) अवयव हैं।
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