यदि \(A\subseteq B\), (n(A)=28) और (n(B)=73) है, तो (n(B-A)) कितना होगा?
If \(A\subseteq B\), (n(A)=28), and (n(B)=73), what is (n(B-A))?
Explanation opens after your attempt
Correct Answer
B. (45)
Concept
Since (A) lies completely inside (B), (n(B-A)=73-28=45). In subset cases, the smaller circle lies inside the larger circle.
Why this answer is correct
The correct answer is B. (45). Since (A) lies completely inside (B), (n(B-A)=73-28=45). In subset cases, the smaller circle lies inside the larger circle.
Exam Tip
क्योंकि (A) पूरा (B) के अंदर है, इसलिए (n(B-A)=73-28=45)। उपसमुच्चय में छोटा वृत्त बड़े वृत्त के अंदर बनता है।
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