Alligation:
It is the rule that enables us to find the ratio in which two or more ingredients at the given price must be mixed to produce a mixture of desired price.
Mean Price:
The cost of a unit quantity of the mixture is called the mean price.
Rule of Alligation:
If two ingredients are mixed, then
Quantity of cheaper/Quantity of dearer = (C.P. of dearer - Mean Price)/(Mean price - C.P. of cheaper)
Suppose a container contains x of liquid from which y units are taken out and replaced by water.After n operations,
Quantity of pure liquid = x*[1 -(y/x)]n units.
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