यदि (n(A)=5) और (n\(A\times B\)=35) है, तो (n(B)) कितना होगा?
If (n(A)=5) and (n\(A\times B\)=35), what is (n(B))?
Explanation opens after your attempt
A. (7)
Concept
(n\(A\times B\)=n(A)n(B)), so (35=5n(B)) and (n(B)=7). In such questions, use the formula in reverse too.
Why this answer is correct
The correct answer is A. (7). (n\(A\times B\)=n(A)n(B)), so (35=5n(B)) and (n(B)=7). In such questions, use the formula in reverse too.
Exam Tip
(n\(A\times B\)=n(A)n(B)), इसलिए (35=5n(B)) और (n(B)=7)। ऐसे प्रश्नों में सूत्र को उल्टा भी लगाएं।
Login to save your score, XP, coins and progress.
