यदि \(A=\{1,2,3,4,5\}\) है, तो (1,2) को शामिल और (5) को बाहर रखने वाले उपसमुच्चयों की संख्या कितनी है?
If \(A=\{1,2,3,4,5\}\), how many subsets contain (1,2) and exclude (5)?
Explanation opens after your attempt
Correct Answer
B. (4)
Concept
Elements (1,2) are fixed, (5) is forbidden, and (3,4) are optional. Hence the answer is \(2^2=4\).
Why this answer is correct
The correct answer is B. (4). Elements (1,2) are fixed, (5) is forbidden, and (3,4) are optional. Hence the answer is \(2^2=4\).
Exam Tip
(1,2) निश्चित हैं, (5) निषिद्ध है और (3,4) वैकल्पिक हैं। इसलिए \(2^2=4\) उत्तर है।
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