## Allegation or Mixture Formula’s

**1. Allegation**

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 a desired price

**2. Mean Price**

The cost price of a unit quantity of the mixture is called the mean price.

**3. Example**

Suppose a container contains x of liquid from which y units are taken out and replaced by water .After n operations, the quantity of pure liquid = [x(1-y/x)^{n}] units.

**4. Rule of Allegation**

If two ingredients are mixed, then

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