\(यदि (U={1,2,3,\ldots,25}) और (A={x:x\) पूर्ण वर्ग है\(}) है, तो (A^c) में कितने तत्व होंगे\)?
\(If (U={1,2,3,\ldots,25}) and (A={x:x\) is a perfect square\(}), how many elements are in (A^c)\)?
Explanation opens after your attempt
A. (20)
Concept
The perfect squares from (1) to (25) are (1,4,9,16,25). Hence (n\(A^c\)=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). Hence (n\(A^c\)=25-5=20).
Exam Tip
(1) से (25) तक पूर्ण वर्ग (1,4,9,16,25) हैं। इसलिए (n\(A^c\)=25-5=20) होगा।
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