यदि \(U={1,2,\ldots,20}\), (A) अभाज्य संख्याओं का समुच्चय और (B) विषम संख्याओं का समुच्चय है, तो (A-B) क्या होगा?
If \(U={1,2,\ldots,20}\), (A) is the set of prime numbers and (B) is the set of odd numbers, then what is (A-B)?
Explanation opens after your attempt
A. ({2})
Concept
(A-B) contains primes that are not odd, so only (2) remains. In set difference, remove the elements of the second set.
Why this answer is correct
The correct answer is A. ({2}). (A-B) contains primes that are not odd, so only (2) remains. In set difference, remove the elements of the second set.
Exam Tip
(A-B) में वे अभाज्य होंगे जो विषम नहीं हैं, इसलिए केवल (2) बचेगा। समुच्चय अंतर में दूसरे समुच्चय के तत्व हटा दें।
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