Chapter 4 of 19
Revision Notes
Alligations and Mixtures — Revision Notes
SNAP · Quantitative Aptitude
Quick revision notes for Alligations and Mixtures — key concepts, formulas, and definitions for SNAP Quantitative Aptitude preparation.
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Key concepts, formulas, and definitions from Alligations and Mixtures for SNAP Quantitative Aptitude preparation.
Key Topics to Revise
1
Foundation Concepts and Theory
- Alligation is a visual method to solve weighted average problems when exactly two groups are involved
- It uses cross-proportionality between differences of averages and weights
- The basic principle: n1/n2 = (A2 - Aw)/(Aw - A1), where A1 < Aw < A2
2
Methods of Solution
- Cross Method: Traditional approach using cross multiplication
- Straight Line Method: Visual representation on a number line
- Number line shows A1, Aw, A2 from left to right
3
Three Standard Problem Types
- Case 1: Find weighted average (Aw) when A1, A2, n1, n2 are known
- Case 2: Find ratio (n1:n2) when A1, A2, Aw are known
- Case 3: Find unknown average (A2) when A1, Aw, n1, n2 are known
4
Mixture Problems and Applications
- Mixture problems involve combining liquids, solids, or solutions
- Convert ratios to percentages when suitable for easier calculation
- Some problems require maintaining fractional form throughout
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Key Concepts
The core equation n₁/n₂ = (A₂A visual technique where the differencesA number line approach where A₁Type 1Real
Frequently Asked Questions
What topics are covered in Alligations and Mixtures for SNAP?
Alligations and Mixtures is an important chapter in SNAP Quantitative Aptitude. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Foundation Concepts and Theory, Methods of Solution, Three Standard Problem Types, Mixture Problems and Applications.
How important is Alligations and Mixtures for SNAP?
Alligations and Mixtures is a frequently tested chapter in SNAP Quantitative Aptitude. Questions from this chapter appear regularly in previous year papers. There are 45 practice questions available for this chapter.
How to prepare Alligations and Mixtures for SNAP?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.
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