यदि \(A=\{1,2,3,4,5\}\) और \(B=\{2,4\}\) हैं, तो (B-A) क्या है?
If \(A=\{1,2,3,4,5\}\) and \(B=\{2,4\}\), what is (B-A)?
Explanation opens after your attempt
Correct Answer
A. \( \varnothing \)
Concept
Every element of (B) is in (A), so \(B-A=\varnothing\). If \(B\subset A\), then (B-A) may be empty.
Why this answer is correct
The correct answer is A. \( \varnothing \). Every element of (B) is in (A), so \(B-A=\varnothing\). If \(B\subset A\), then (B-A) may be empty.
Exam Tip
(B) का हर अवयव (A) में है, इसलिए \(B-A=\varnothing\) है। यदि \(B\subset A\), तो (B-A) खाली हो सकता है।
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