\(यदि सार्वत्रिक समुच्चय (U={1,2,3,\ldots,20}) और (A={x:x \in U\) तथा x अभाज्य है}) है, तो (A') क्या होगा?
\(If the universal set is (U={1,2,3,\ldots,20}) and (A={x:x \in U\) and x is prime}), then what is (A')?
Explanation opens after your attempt
A. (A'={1,4,6,8,9,10,12,14,15,16,18,20})
Concept
(A') contains the elements of (U) that are not in (A). In exams remember that (1) is not prime.
Why this answer is correct
The correct answer is A. (A'={1,4,6,8,9,10,12,14,15,16,18,20}). (A') contains the elements of (U) that are not in (A). In exams remember that (1) is not prime.
Exam Tip
(A') में (U) के वे सदस्य आते हैं जो (A) में नहीं हैं। परीक्षा में (1) को अभाज्य न मानें।
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