यदि (A\setminus\(B\setminus C\)=A), तो कौन सा समावेशन अवश्य सत्य है?
If (A\setminus\(B\setminus C\)=A), which inclusion must be true?
Explanation opens after your attempt
A. \(A\cap B\subseteq C\)
Concept
Removing \(B\setminus C\) from (A) changes nothing, so (A\cap\(B\setminus C\)=\varnothing). Hence elements of \(A\cap B\) must lie in (C).
Why this answer is correct
The correct answer is A. \(A\cap B\subseteq C\). Removing \(B\setminus C\) from (A) changes nothing, so (A\cap\(B\setminus C\)=\varnothing). Hence elements of \(A\cap B\) must lie in (C).
Exam Tip
(A) से \(B\setminus C\) हटाने पर कुछ नहीं घटा, इसलिए (A\cap\(B\setminus C\)=\varnothing)। अतः \(A\cap B\) के तत्व (C) में होंगे।
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