\(यदि (U={x:x\) एक अंक है\(}) और (A={x:x\) सम अंक है\(}), तो (A^c) में कितने तत्व हैं\)?
\(If (U={x:x\) is a digit\(}) and (A={x:x\) is an even digit\(}), how many elements are in (A^c)\)?
Explanation opens after your attempt
A. (5)
Concept
The digit set is \(U=\{0,1,2,3,4,5,6,7,8,9\}\). There are (5) even digits, so there are (5) odd digits.
Why this answer is correct
The correct answer is A. (5). The digit set is \(U=\{0,1,2,3,4,5,6,7,8,9\}\). There are (5) even digits, so there are (5) odd digits.
Exam Tip
अंकों का \(U=\{0,1,2,3,4,5,6,7,8,9\}\) है। सम अंक (5) हैं, इसलिए विषम अंक भी (5) हैं।
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