Alligation- the rate to find the ratio in which two or more ingredients at the given price.must be mixed to produce a mixer of a desired price.

Mean price- the cost price of a unit remobilty of the mix are is called mean price.

Rule of allegation

cheaper quantity: dearer quantity= (d-m): (m-c)

A container of x unit capacity of liquid, when we taken out some unit say x replaced by water, when we do the same operation n times.

quantity of pure liquid=