- 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 = C.P. of dearer - Mean Price Quantity of dearer Mean price - C.P. of cheaper We present as under:C.P. of a unit quantity

of cheaperC.P. of a unit quantity

of dearer( *c*)Mean Price

(*m*)( *d*)( *d*-*m*)( *m*-*c*)(Cheaper quantity) : (Dearer quantity) = (*d*-*m*) : (*m*-*c*). - 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**n*units. *x*

# Alligation or Mixture - Important Formulas | Aptitude

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