Profit Loss on Selling Multiple Items

Duration: 7 min

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Inside: a video lesson and guided study material.

Module outline

  1. Quantitative Ability: Percentage, Profit and Loss, Ratio and Proportion (Ratios), Average, Time and Work, Speed Time and Distance, Simple Interest and Compound Interest, Age Problems, Number System, Divisibility Rules, HCF LCM, Algebra, Permutation and Combination, Probability, Data Interpretation, Logarithm, Sequence and Series (Series), Powers and Exponents (Surds and Indices), Speed Mathematics and Basic Mathematics
  2. Logical Reasoning: Seating Arrangements, Puzzle Solving (Puzzles), Data Arrangement, Coding Decoding, Blood Relations, Directions (Direction Test), Ranking, Order and Sequence, Data Sufficiency, Venn Diagram, Inequality, Series (Number and Letter Series) (Numerical Relations and Reasoning), Logical Sequence Of Words, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Selection Decision Table (Decision Making), Analogy, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning)
  3. Verbal Ability: Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Subject Verb Agreement (Verb Noun Agreement), Tenses, Articles, Preposition, Conjunction, Modals, Active Passive Voice (Voice), Direct and Indirect Speech, Vocabulary, Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Sentence Completion (Fill in the blanks), Sentence Correction (Error Correction), Cloze Test (Cloze Passage), Facts, Inference and Judgements
  4. Programming Fundamentals (Technical): C Fundamentals
  5. Data Structures (Technical): Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  6. Algorithms (Technical): Algorithm Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Time Complexity Analysis, Advanced Algorithms
  7. OOPs (Technical): Object Oriented Programming (OOPS)
  8. DBMS (Technical): Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, ORDBMS, Database Security & Authorization, Query Processing & Optimization, Enhanced Data Models, Data Warehousing & Mining, Big Data Systems, NoSQL
  9. SQL (Technical): SQL
  10. Operating Systems (Technical): Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Windows OS, Linux OS, Security, Distributed Systems, Virtual Machines
  11. Computer Networks (Technical): Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Security, Mobile Technology, Cloud Computing and IoT, Cyber and Info Security
  12. Software Engineering (Technical): Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  13. Coding/Automata Round: Coding Questions by Yash Sir, C Programming by Yash Sir, Programming in C++, Java, Python for Placements by Yash Sir, Pseudo Codes
  14. Personality / Behavioral Assessment: Behavioral Assessment (Behavioral Competency Profiling) (Psychometric Test)
  15. Writing Assessment: English Writing Ability
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video is a tutorial on solving a profit and loss problem from a previous competitive exam. It begins by presenting a question about Vijay Malya selling 30 Kingfisher soda items at Rs. 1500, incurring a 25% loss, and then needing to find the new selling price 'x' to achieve a 20% profit. The instructor first demonstrates the 'Conventional Method' by calculating the cost price (CP) using the formula SP = CP(100-loss)/100, which results in CP = 200. He then calculates the new selling price for a 20% profit using SP = CP(100+profit)/100, which gives SP = 240. The final answer is the total selling price for 30 items, 240 * 30 = 7200. The video then introduces a faster 'Chain Rule' method, which directly calculates the new selling price as (100+profit)/(100-loss) * original SP, resulting in (120/75) * 1500 = 240, and then multiplies by 30 to get 7200. The video concludes with a 'Thanks for Watching' screen.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a title card displaying a 3D animation of a person on a seesaw, with 'PROFIT' on the left and 'LOSS' on the right, symbolizing the balance between profit and loss. This transitions to a slide with a question: 'Q1: Vijay Malya encounters 25% loss on selling 30 Kingfisher soda at Rs. 1500. Now in order to gain 20% profit on same 30 items, he sells these items at some 'x' rupees. Find the value of 'x' ?'. The slide also includes a meme of three men on a motorcycle with the text 'JALDI AIRPORT BHAGA' and 'VIJAY MALLYA RETURN AA RAHA HAI..'. The instructor, Yash Jain Sir, is visible in a small window, introducing the problem and stating it's an important question from the 2018 TCS exam.

  2. 2:00 – 5:00 02:00-05:00

    The instructor begins the 'Conventional Method' of solving the problem. He writes on a virtual green board, starting with the formula for selling price with a loss: SP = CP(100-loss)/100. He substitutes the given values: 1500 = CP(100-25)/100, which simplifies to 1500 = CP(75)/100. He then solves for CP, writing CP = (1500 * 100) / 75, which he calculates as CP = 200. He then uses the formula for selling price with a profit: SP = CP(100+profit)/100. Substituting the values, he writes SP = 200(100+20)/100, which simplifies to SP = 200(120)/100, resulting in SP = 240. He notes that this is the selling price per item.

  3. 5:00 – 7:20 05:00-07:20

    The instructor introduces the 'Chain Rule (5 second Short Trick)'. He writes the formula: (100+profit)/(100-loss) * original SP. He substitutes the values: (100+20)/(100-25) * 1500, which is (120/75) * 1500. He simplifies 120/75 to 8/5, so the calculation becomes (8/5) * 1500 = 240. He confirms this is the new selling price per item. He then multiplies 240 by 30 to get the total selling price for all 30 items, which is 7200. The final answer is x = 7200. The video ends with a 'Thanks for Watching' screen.

The video provides a comprehensive solution to a profit and loss problem, demonstrating two distinct methods. The 'Conventional Method' is a step-by-step approach that first calculates the cost price from the initial loss and then uses it to find the new selling price for the desired profit. The 'Chain Rule' method is a shortcut that directly relates the new selling price to the old one using the ratio of the profit and loss percentages, allowing for a much faster calculation. The core concept is that the cost price remains constant, and the problem is solved by finding the new selling price that yields a 20% profit on that fixed cost.

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