APTITUDE

Numbers
H.C.F and L.C.M
Decimal Fractions
Simplification
Square and Cube roots
Average
Problems on Numbers
Problems on Ages
Surds and Indices
Percentage
Profit and Loss
Ratio And Proportions
Partnership
Chain Rule
Time and Work
Pipes and Cisterns
Time and Distance
Trains
Boats and Streams
Alligation or Mixture
Simple Interest
Compound Interest
Logorithms
Areas
Volume and Surface area
Races and Games of Skill
Calendar
Clocks
Stocks ans Shares
True Discount
Bankers Discount
Oddmanout and Series
Data Interpretation
probability
Permutations and Combinations
Puzzles
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ALLIGATION OR MIXTURES




Important Facts and Formula:
1.Allegation:It is the rule that enables us to find the
ratio in which two of 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.Rule of Allegation:If two ingredients are mixed then
Quantity of Cheaper / Quantity of Dearer =
(C.P of Dearer – Mean Price) /(Mean Price–C.P of Cheaper).

C.P of a unit quantity of cheaper(c)    C.P of unit quantity of dearer(d)


                              Mean Price(m)

            (d-m)                                   (m-c)

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

4.Suppose a container contains x units 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.


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