\(यदि (U={1,2,\ldots,100}), (A={x:x\) पूर्ण वर्ग है}), तो (|A'|) कितना है?
\(If (U={1,2,\ldots,100}), (A={x:x\) is a perfect square}), what is (|A'|)?
Explanation opens after your attempt
Correct Answer
B. (90)
Concept
Perfect squares up to (100) are from \(1^2\) to \(10^2\), giving (10) elements. Hence (|A'|=100-10=90).
Why this answer is correct
The correct answer is B. (90). Perfect squares up to (100) are from \(1^2\) to \(10^2\), giving (10) elements. Hence (|A'|=100-10=90).
Exam Tip
(100) तक पूर्ण वर्ग \(1^2\) से \(10^2\) तक (10) हैं। इसलिए (|A'|=100-10=90)।
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