Mixture and Alligation

Q1. What are alligation or mixture questions in quantitative aptitude? 

Solution:

Alligation or mixture questions in quantitative aptitude are those that involve finding the ratio in which two or more components with different prices or strengths are mixed together to get a required strength or price.

Q3. What are some common strategies or formulas used to solve alligation or mixture questions? 

Solution:

Some common formulas used to solve alligation or mixture questions include the rule of alligation, the weighted average formula, and the proportion formula.

Q4. What are some examples of alligation or mixture questions commonly asked in competitive exams? 

Solution:

Here’s an example: 

A chemist has a 20% alcohol solution and a 60% alcohol solution. How many liters of each should be mixed together to make 100 liters of a 40% alcohol solution?


Alligation or Mixture – Aptitude Questions and Answers

Mixture and alligation are important concepts in quantitative aptitude used to determine the ratio and cost of sale for a mixture made up of two or more materials. In competitive exams, mixture and alligation questions are commonly asked to test a candidate’s ability to calculate the mean value of a mixture with different ratios and amounts of ingredients, as well as to find the proportions of elements being mixed.

While these concepts may seem challenging, regular practice and solving similar questions can help candidates gain insight and clarity into this topic. To prepare for these types of questions, it’s important to familiarize oneself with the quantitative aptitude syllabus and the exams in which this section is included.

Practice Quiz :

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Mixture and Alligation: Concept and Formulas

Mixture is a combination of two or more elements to form a third element. The questions from mixture are usually based on Ratio and Proportion and do not require any special formula. Alligation is a rule that enables us to quickly calculate the price of a mixture, given that it is a mix of two elements having different prices. Alligation Rule :  Here, mean price is the price of 1 unit of the mixture. Please note that in the above formula, everything has to be calculated by considering one unit only. Another point to be noted is that mean price would always be between cheaper price and dearer price. In questions of replacement where we initially have some quantity of pure element (like petrol), and we keep on replacing a fixed portion of this pure liquid every time with some other element (like water) thus making it a mixture, we apply the following formula for finding the quantity of pure element after ‘n’ replacements : P x [1 – (R / P)]n, where P is the initial quantity of pure element R is the quantity replaced every time n is the number of replacement...

Tips and Tricks to Solve Mixture and Alligation Questions

The alligation rule is a mixture problem-solving technique that can be used to calculate the rate at which an article can be sold.  By using this technique, one can figure out the ratio between two different ingredients in a given mixture.  Questions from topics such as partnerships, time and work, and wages can also be solved easily with this concept.  It may seem complicated at first but once you get familiar with the formulas involved, it becomes much simpler....

Sample Questions on Mixture and Alligation

Q1: From a vessel of 20 liters of pure milk, 1 liter is taken out and replaced with water, so as to keep the volume constant at 20 liters. This process is repeated 5 times. Find the percentage of pure milk left in the vessel after 5 replacements....

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FAQs on Mixture and Alligation

Q1. What are alligation or mixture questions in quantitative aptitude?...