यदि \(A=\{{1},2\}\) है तो (n(A)) कितना है?
If \(A=\{{1},2\}\), what is (n(A))?
Explanation opens after your attempt
B. (2)
Concept
({1}) is one element and (2) is another element. Therefore (A) has (2) elements.
Why this answer is correct
The correct answer is B. (2). ({1}) is one element and (2) is another element. Therefore (A) has (2) elements.
Exam Tip
({1}) एक तत्व है और (2) दूसरा तत्व है। इसलिए (A) में कुल (2) तत्व हैं।
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