यदि \(A=\{p,q\}\), \(B=\{p,q,r,s\}\), तो कितने (X) ऐसे हैं कि \(A\subset X\subseteq B\)?
If \(A=\{p,q\}\), \(B=\{p,q,r,s\}\), how many (X) satisfy \(A\subset X\subseteq B\)?
Explanation opens after your attempt
Correct Answer
B. (3)
Concept
Elements (r,s) are optional, but \(X\ne A\). Therefore the answer is \(2^2-1=3\).
Why this answer is correct
The correct answer is B. (3). Elements (r,s) are optional, but \(X\ne A\). Therefore the answer is \(2^2-1=3\).
Exam Tip
(r,s) वैकल्पिक हैं लेकिन (X=A) नहीं होना चाहिए। इसलिए \(2^2-1=3\) उत्तर है।
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