\(यदि (U={1,2,\ldots,20}), (A={x:x \in U,x\) सम है\(}) और (B={x:x \in U,x\) अभाज्य है\(}), तो (A'\cap B) क्या है\)?
\(If (U={1,2,\ldots,20}), (A={x:x \in U,x\) is even\(}), and (B={x:x \in U,x\) is prime\(}), what is (A'\cap B)\)?
Explanation opens after your attempt
Correct Answer
A. ({3,5,7,11,13,17,19})
Concept
(A') is the set of odd numbers and (B) is the set of primes. Thus \(A'\cap B\) contains all odd primes except (2).
Why this answer is correct
The correct answer is A. ({3,5,7,11,13,17,19}). (A') is the set of odd numbers and (B) is the set of primes. Thus \(A'\cap B\) contains all odd primes except (2).
Exam Tip
(A') विषम संख्याओं का समुच्चय है और (B) अभाज्य संख्याओं का। इसलिए \(A'\cap B\) में (2) को छोड़कर सभी विषम अभाज्य आएंगे।
Login to save your score, XP, coins and progress.