यदि (y=160-bx) में (x=3) से (x=8) तक (y) (45) घटता है, तो (b) क्या है?
If in (y=160-bx), (y) decreases by (45) from (x=3) to (x=8), what is (b)?
Explanation opens after your attempt
C. (9)
Concept
The change in (x) is (5). The total decrease is (5b=45), so (b=9).
Why this answer is correct
The correct answer is C. (9). The change in (x) is (5). The total decrease is (5b=45), so (b=9).
Exam Tip
(x) में परिवर्तन (5) है। कुल कमी (5b=45) है इसलिए (b=9) है।
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