यदि \(U={x:x\in\mathbb{Z},-5\le x\le 15}\) और \(A={x:x\in U,x\equiv 2 \pmod{5}}\), तो (n(A')) क्या है?
If \(U={x:x\in\mathbb{Z},-5\le x\le 15}\) and \(A={x:x\in U,x\equiv 2 \pmod{5}}\), what is (n(A'))?
Explanation opens after your attempt
A. (17)
Concept
\(A=\{-3,2,7,12\}\), so (n(A)=4). Since (U) has (21) elements, (n(A')=17).
Why this answer is correct
The correct answer is A. (17). \(A=\{-3,2,7,12\}\), so (n(A)=4). Since (U) has (21) elements, (n(A')=17).
Exam Tip
\(A=\{-3,2,7,12\}\) है, इसलिए (n(A)=4)। (U) में (21) सदस्य हैं, अतः (n(A')=17) है।
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