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Home->Aptitude->Alligation or Mixture ->Important Formulas

Alligation or Mixture :-

::Important Formulas

Here Some Basic Formulas/Rules Are given below :-

  1. 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.

  2. 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)

    We present as under:

    C.P. of a unit quantity of cheaper C.P. of a unit quantity of dearer
    (c) Mean price
         (m)
    (d)
    (d-m) (m-c)

    So    (Cheaper quantity) : (Dearer quantity) = (d-m) : (m-c).

  3. Mean Price:

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

  4. 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 -
    x
    y
    )
    n ] units


  5. Click here for Important Examples