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When two or more things are mixed together in a certain ratio, then the product formed is called a mixture or alligation. This chapter is an application of Ratio and Proportion.The Alligation SituationIt is a situation in which two groups of elements are mixed together to form a third group containing the elements of both the groups.If the average of the first group is A1 and the number of elements is n1 and the average of the second group is A2 and the number of elements is n2, then to find the average of the new group formed, we can use either the weighted average equation (discussed in the chapter Average) or the alligation equation.As a convenient convention, we take A1 < A2. Then, by the principal of averages, we getA1 < Aw < A2.
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