Rapid Revision for CSIR NET Part A: Formula Sheets on Mixture And Alligation - Check Here!!!

By Astha Singh|Updated : February 14th, 2022

CSIR NET Part-A Formula Sheet: During the preparation, the candidates study different formulas to solve problems, but at the last moment, these formulas might not be remembered by the candidates due to exam fear or pressure. We at BYJU'S Exam Prep do not want our students to lag anywhere during the preparation, so we have come up with a concept of a Formula Sheet that will help them revise the important formulas at the last moment. This formula sheet will be a short revision tool and contain only important formulas that need to be studied at the last minute to boost the score. Our experienced subject-matter experts have meticulously designed this CSIR NET General Aptitude Formula Sheet to provide you with the best authentic material. 

In this article, we will cover the CSIR NET General Aptitude Most Important Formulas of Mixture And Allegation. Aspiring candidates can check all the most important formulas of Mixture And Alligation for the last-minute revision. Scroll down the full article to find out!

Formula Sheet On Mixture And Alligation

Mixture & Alligation

Definition: When two or more types of liquids are mixed with each other in a vessel, we get what is called as a “mixture”. Here the amount or quantities of two or more liquids is expressed in terms of respective ratios or percentage values.
For example, milk and water can be mixed to get a mixture. Mixtures can be identified by the name of liquids and their ratio.
Mixtures are of 3 types:
1. Solid mixture.
2. Liquid mixture.
3. Gaseous mixture.
Depending upon the number of ingredients of Types of mixtures:
Simple Mixtures: When two or more different ingredients/solutions are mixed together.
Compound Mixtures: When two or more simple mixtures are mixed together.
In mixture and solutions, we deal with 2 concepts:
(a) Alligation
(b) Replacement
Alligation: It is a method in which two or more solutions/ingredients are mixed in different ratios and the desired mixture is obtained or the desired mixture is given and the respective ratio in which the given solutions are mixed is asked in the question.
Note: The basic concept of Alligation lies in “weighted average”.
If we mix 2 things, the average of both are A1 and A2,
and the quantities of both are n1 and n2.
Then the average of the mixture is called as “weighted average”.

Important Formulas for Mixture and Alligation:
1. If two different articles are priced at CP1 and CP2 with their quantities Q1, and Q2 then the Cost Price of the Mixture is calculated by the following Method:


2. Let a container contains “x” units of liquid from which “m” units of liquid are taken out and replaced by water or any other liquid. And this operation is repeated for “n” times. Thus, the quantity of remaining pure liquid after “n” operations:


3. Componendo Rule- If

4. Dividend Rule- If

5. Componendo and Dividendo Rule- If

6. Invertendo Rule- If

7. Alternendo Rule- If

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