यदि \(A\subset B\) और (B-A={9}) है, तो कितने समुच्चय (X) ऐसे हैं कि \(A\subseteq X\subseteq B\)?
If \(A\subset B\) and (B-A={9}), how many sets (X) satisfy \(A\subseteq X\subseteq B\)?
Explanation opens after your attempt
B. (2)
Concept
Only (9) is optional outside (A). Therefore (X) can be (A) or (B).
Why this answer is correct
The correct answer is B. (2). Only (9) is optional outside (A). Therefore (X) can be (A) or (B).
Exam Tip
(A) के बाहर केवल (9) वैकल्पिक है। इसलिए (X=A) या (X=B) हो सकता है।
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