\(यदि (A={x\in\mathbb{N}: x\le 20,\ x\) is prime\(}) और (B={x\in\mathbb{N}: x<20,\ x\) is odd}), तो (A-B) क्या है?
\(If (A={x\in\mathbb{N}: x\le 20,\ x\) is prime\(}) and (B={x\in\mathbb{N}: x<20,\ x\) is odd}), what is (A-B)?
Explanation opens after your attempt
Correct Answer
A. ({2})
Concept
All odd primes in (A) are in (B), so only (2) remains. (19) is also in (B) because it is odd and less than (20).
Why this answer is correct
The correct answer is A. ({2}). All odd primes in (A) are in (B), so only (2) remains. (19) is also in (B) because it is odd and less than (20).
Exam Tip
(A) के सभी विषम अभाज्य (B) में चले जाते हैं, केवल (2) बचता है। (19) भी (B) में है क्योंकि वह विषम और (20) से छोटा है।
Login to save your score, XP, coins and progress.