यदि (y=420-bx) में (x=8) से (x=16) तक (y) (152) घटता है, तो (b) क्या है?
If in (y=420-bx), (y) decreases by (152) from (x=8) to (x=16), what is (b)?
Explanation opens after your attempt
C. (19)
Concept
The change in (x) is (8). The total decrease is (8b=152), so (b=19).
Why this answer is correct
The correct answer is C. (19). The change in (x) is (8). The total decrease is (8b=152), so (b=19).
Exam Tip
(x) में परिवर्तन (8) है। कुल कमी (8b=152) है इसलिए (b=19) है।
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