But kpadma dragged me into this. I think it is all about addiction. I wanr everyone about this addiction and suggest concentrating on certain known weak points.
Well, What can I say. I'm an addict, now!
Here is another method!
Customer gets 1 liter for $8
Vender pays (1-x)*$6.4 for that adulterated 1 liter milk and makes
Where X = water in 1 liter adulterated milk
6.4(1-x) * 1.375 = 8
Solve for X, we get 1/11.
Pure milk in 1 liter adultrated milk is 10/11
W:M = 1/11 : 10/11 = 1:10
Well, time for another round