यदि \(A\times B\) में (24) अवयव हैं और (A) में (B) से (2) अधिक अवयव हैं, तो (n(A)) क्या है?
If \(A\times B\) has (24) elements and (A) has (2) more elements than (B), what is (n(A))?
Explanation opens after your attempt
Correct Answer
B. (6)
Concept
Let (n(B)=m), then (n(A)=m+2) and (m(m+2)=24). This gives (m=4), so (n(A)=6).
Why this answer is correct
The correct answer is B. (6). Let (n(B)=m), then (n(A)=m+2) and (m(m+2)=24). This gives (m=4), so (n(A)=6).
Exam Tip
मान लें (n(B)=m), तब (n(A)=m+2) और (m(m+2)=24)। इससे (m=4), इसलिए (n(A)=6)।
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