\(यदि (U={1,2,\ldots,30}), (A={x:x \in U\) तथा x का अंतिम अंक 0 या 5 है}), तो (n(A')) क्या है?
\(If (U={1,2,\ldots,30}), (A={x:x \in U\) and the last digit of x is 0 or 5}), what is (n(A'))?
Explanation opens after your attempt
A. (24)
Concept
(A) has (6) elements: (5,10,15,20,25,30). Therefore (n(A')=30-6=24).
Why this answer is correct
The correct answer is A. (24). (A) has (6) elements: (5,10,15,20,25,30). Therefore (n(A')=30-6=24).
Exam Tip
(A) में (5,10,15,20,25,30) यानी (6) सदस्य हैं। इसलिए (n(A')=30-6=24) है।
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