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Asked by vt2008 | 8th Sep, 2009, 03:16: PM

Expert Answer:

Let the list price of the book be  Rs. x  
Now total budget  be Rs.1200  
No. of books purchased  = 1200/x 
If the list price is increased by 10 Rs then new price = Rs.(x+10) 
1200/(x+10)
ATQ 1200/x-1200/(x+10)=10
1200(10/(x2+10x)) =10 
x2+10x-1200=0
Solving the equation we get x =-40,30
cost cannot be negative hence  list price of the book is Rs.30

 

Answered by  | 8th Sep, 2009, 03:42: PM

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