SHORT TRICKS to solve problems on MIXTURE OF MIXTURE

Duration: 11 min

This video lesson is available to enrolled students.

Return to /learn/RSSB-INFORMATICS-ASSISTANT/numerical-ability-problem-solving/mixture-and-alligation/three-ingredient-mixtures-and-mixture-of-mixtures/asset-short-tricks-to-solve-problems-on-mixture-of-mixture after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. Numerical Ability & Problem Solving: Speed Mathematics and Basic Mathematics, Arithmetic, Number System, HCF LCM, Divisibility Rules, Percentage, Ratio and Proportion (Ratios), Average, Profit and Loss, Simple Interest and Compound Interest, Mixture and Alligation, Time and Work, Pipe and Cistern, Speed Time and Distance, Age Problems, Partnership, Data Interpretation, Mental Ability, Sequence and Series (Series), Powers and Exponents (Surds and Indices), Algebra, Statistics, Logarithm, Mensuration and Geometry, Permutation and Combination, Probability, Sequences and Series, Powers, Surds and Logarithms, Subject-Verb Agreement, Sentence Completion, Geometry, Sentence Structure and Correction, Data Sufficiency, Trigonometry, Measurement and Quantity Take-Off, Signal Space and Optimum Detection, Probability, Statistics, Algebra, Time and Work, Speed, Time and Distance, Data Interpretation, Combinatorics
  2. Logical Reasoning: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Seating Arrangements, Blood Relations, Directions (Direction Test), Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Logical Sequence Of Words, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence, Selection Decision Table (Decision Making), Alphabet and Word Tests, Numerical Reasoning, Number System, Averages, Mixtures and Alligation, Percentages, Series Completion, Analogy and Classification, Patterns in Two-Dimensional Figures, Coding and Decoding, Mathematical Operations, Direction Sense, Logical Deduction and Induction, Syllogisms and Venn Diagrams, Critical Reasoning, Order, Ranking and Sequence, Reading Comprehension, Profit, Loss and Discount, Constraint Puzzles, Traverse Surveying, Ratio and Proportion, Mensuration, Permutations and Combinations, Clocks and Calendars, Assembling and Grouping of Shapes, Transformation of Shapes, Three-Dimensional Patterns and Visualization, Cubes and Dice, Vocabulary, Blood Relations
  3. General Knowledge & Current Affairs (India + Rajasthan): History, Geography, Polity, Indian Economy, Static General Knowledge, State Wise GK, GK- Current Affairs, Environment, Physics
  4. Computer Fundamentals & Operating Systems: Basics of COA, Floating Point Rep, Digital Systems & Boolean Basics, Number Representation, Number System, Introduction to OS, File Management, Windows OS, Unix OS, Linux OS, Register Transfer and Microoperations, Virtual Memory
  5. Computer Networks: Introduction to CN, Data Communication, DLL: Error Control, DLL: Access Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Application Layer, Hardware Basics, Network Security
  6. Cyber Security: Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing, Electronic Data Interchange and E-Commerce, Physical Security and Cryptography Basics, Intrusion Detection Systems (IDS), Cyber Safety and Security, Ethical Hacking
  7. Programming (C & OOP): C Fundamentals, Control Flow, Arrays & Pointers, Functions, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, OOPS with C++, Operators & Expressions, Sorting Algorithms, Java Fundamentals, Java
  8. MS Office & Data Processing: MS Office Applications, Basics of DBMS
  9. Internet & Web Technology: Society, Law & Ethics, Terms & Abbreviations, Keyboard Shortcuts, Emerging Tech Trends, Artificial Intelligence, Emerging Technologies, Internet Fundamentals, Website, Browser & Services, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video is a lecture on the topic of 'Mixtures & Alligations,' presented by an instructor named Yash Jain. The video begins with a title slide and then transitions to a problem-solving session. The core of the video is a detailed, step-by-step solution to a classic mixture problem. The problem states that two vessels, A and B, contain milk and water in the ratios 5:3 and 2:3, respectively. The question asks for the ratio in which these two mixtures must be combined to create a new mixture that is exactly half milk and half water. The instructor uses algebraic variables (x and y) to represent the quantities taken from each vessel, calculates the total milk and water in the final mixture, and sets up an equation where the ratio of milk to water is 1:1. The solution is derived by equating the total milk to the total water, leading to the conclusion that the required ratio is 2:5. The video concludes with a 'Thanks for Watching' screen.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with an animated title card featuring a cartoon scientist in a lab, with the word 'MIXTURE' displayed at the bottom. This transitions to a presentation slide with a geometric background. The slide is titled 'MIXTURES & ALLIGATIONS' and is attributed to 'By Yash Jain'. A small video feed of the instructor, Yash Jain, is visible in the bottom right corner. The instructor introduces the topic of mixtures and alligations, setting the stage for the lesson.

  2. 2:00 – 5:00 02:00-05:00

    The video displays a problem on a slide. The text reads: 'Que: Two vessels A and B contain milk and water mixed in the ratio 5:3 and 2:3. When these mixtures are mixed to form a new mixture containing half milk and half water, they must be taken in the ratio? a) 2:5 b) 3:5 c) 4:5 d) 7:3'. The instructor begins to solve the problem by setting up variables. He writes 'x' for the quantity taken from vessel A and 'y' for the quantity taken from vessel B. He then calculates the amount of milk and water from each vessel: for vessel A, milk is 5x/8 and water is 3x/8; for vessel B, milk is 2y/5 and water is 3y/5.

  3. 5:00 – 10:00 05:00-10:00

    The instructor continues the solution on the whiteboard. He writes the total milk as (5x/8 + 2y/5) and the total water as (3x/8 + 3y/5). He then sets up the equation for the final mixture, which is half milk and half water, meaning the total milk must equal the total water. The equation is: 5x/8 + 2y/5 = 3x/8 + 3y/5. He simplifies this equation by subtracting 3x/8 from both sides and 2y/5 from both sides, resulting in 2x/8 = y/5. He further simplifies this to x/4 = y/5. By cross-multiplying, he gets 5x = 4y, which leads to the ratio x/y = 4/5. However, he then re-evaluates the equation, and the final answer shown is 2:5, indicating a possible error in the final step of the calculation shown on screen.

  4. 10:00 – 11:22 10:00-11:22

    The instructor revisits the problem, and the on-screen text is slightly different, now reading 'Two vessels A and B contain milk and water mixed in the ratio 5:3 and 2:3. When these mixtures are mixed to form a new mixture containing half milk and half water, they must be taken in the ratio?'. He uses a different method, the rule of alligation, to solve it. He calculates the concentration of milk in vessel A as 5/8 and in vessel B as 2/5. The required concentration is 1/2. He sets up the alligation diagram, showing the difference between the required concentration and the concentrations of A and B. The difference for A is 5/8 - 1/2 = 1/8, and for B is 1/2 - 2/5 = 1/10. The ratio of the quantities is the inverse of these differences: (1/10) : (1/8), which simplifies to 8:10 or 4:5. The video ends with a 'THANKS FOR WATCHING' screen.

The video provides a comprehensive lesson on mixtures and alligations, using a single, well-defined problem to illustrate the concepts. It demonstrates two different methods for solving the problem: the algebraic method, which involves setting up and solving an equation based on the total quantities of milk and water, and the rule of alligation, a more direct method that uses the differences in concentration. The instructor's step-by-step approach, with clear on-screen writing, makes the problem-solving process accessible. The video effectively teaches the core principles of mixture problems, which are common in competitive exams like the CAT.

Loading lesson…