यदि \(U={1,2,\ldots,25}\) और \(A={x:x\) पूर्ण वर्ग है(}), तो (n(A')) कितना है?
If \(U={1,2,\ldots,25}\) and \(A={x:x\) is a perfect square(}), what is (n(A'))?
Explanation opens after your attempt
A. (20)
Concept
The perfect squares from (1) to (25) are (1,4,9,16,25), giving (5) elements. Thus (n(A')=25-5=20).
Why this answer is correct
The correct answer is A. (20). The perfect squares from (1) to (25) are (1,4,9,16,25), giving (5) elements. Thus (n(A')=25-5=20).
Exam Tip
(1) से (25) तक पूर्ण वर्ग (1,4,9,16,25) हैं, यानी (5) तत्व। इसलिए (n(A')=25-5=20)।
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