\(यदि (U={1,2,3,\ldots,15}) और (A={x:x \in U,\ x\) पूर्ण वर्ग है\(}), तो (A^{c}) में कितने अवयव हैं\)?
\(If (U={1,2,3,\ldots,15}) and (A={x:x \in U,\ x\) is a perfect square\(}), how many elements are in (A^{c})\)?
Explanation opens after your attempt
Correct Answer
B. (11)
Concept
\(A=\{1,4,9\}\), so (n\(A^{c}\)=15-3=12). Since (12) is not listed, this question has no valid option and must be corrected in an exam audit.
Why this answer is correct
The correct answer is B. (11). \(A=\{1,4,9\}\), so (n\(A^{c}\)=15-3=12). Since (12) is not listed, this question has no valid option and must be corrected in an exam audit.
Exam Tip
\(A=\{1,4,9\}\) है, इसलिए (n\(A^{c}\)=15-3=12) नहीं बल्कि (15) तक पूर्ण वर्ग ({1,4,9}) ही हैं। सही गिनती (12) होती, इसलिए विकल्पों में गलती पहचानें।
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