Profit Loss Percent on Multiple Items

Duration: 9 min

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Inside: a video lesson and guided study material.

Module outline

  1. Language Skills (English): Vocabulary, Verbal Analogy (Word Based Analogy), Noun, Pronoun, Verb, Adjectives, Adverb, Preposition, Articles, Conjunction, Tenses, Modals, Subject Verb Agreement (Verb Noun Agreement), Determiner, Active Passive Voice (Voice), Direct and Indirect Speech, Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Sentence Construction, Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Cloze Test (Cloze Passage)
  2. General Aptitude (Quantitative Ability): Percentage, Ratio and Proportion (Ratios), Average, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Pipe and Cistern, Speed Time and Distance, Mixture and Alligation, Age Problems, Partnership, Number System, HCF LCM, Divisibility Rules, Powers and Exponents (Surds and Indices), Algebra, Data Interpretation, Statistics, Sequence and Series (Series), Logarithm, Arithmetic, Speed Mathematics and Basic Mathematics
  3. General Aptitude (Reasoning Ability): Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Syllogisms, Blood Relations, Directions (Direction Test), Ranking, Order and Sequence, Inequality, Logical Sequence Of Words, Seating Arrangements, Puzzle Solving (Puzzles), Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Cubes & Dices, Venn Diagram, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Selection Decision Table (Decision Making), Analytical Reasoning (Counting Figures Reasoning), Clock, Calendar, Data Sufficiency, Analogy
  4. Technical Skills MCQ - Data Structure: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  5. Technical Skills MCQ - Networking: 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, Application Layer, Mobile Technology, Network Security
  6. Technical Skills MCQ - Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, File Management, Windows OS, Linux OS, Security, Virtual Machines
  7. Technical Skills MCQ - DBMS: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), File Organization & Indexing, Relational Algebra, SQL, Transaction Management, Concurrency Control, Database Recovery, Database Security & Authorization, NoSQL
  8. Technical Skills MCQ - Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  9. Technical Skills MCQ - Cloud Computing: Emerging Tech Trends, Cloud Computing and IoT
  10. Technical Skills MCQ - Cyber Security: Cyber and Info Security, Security in Mobile and Wireless Computing
  11. Technical Skills (Coding): Coding Questions by Yash Sir, C Programming by Yash Sir, Programming in C++, Java, Python for Placements by Yash Sir, Object Oriented Programming (OOPS)
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a tutorial on solving a profit and loss problem from an Infosys exam, presented by an instructor from Knowledge Gate. The core problem involves a man who buys 11 Surflexcel pouches for 10 rupees and sells 10 pouches for 11 rupees, and the task is to find the total profit or loss percentage. The instructor first demonstrates the 'traditional method' by calculating the cost price (CP) and selling price (SP) per pouch, then determining the total CP and SP for a common number of pouches (110) to find the overall profit percentage. He then introduces a 'short trick' method, which uses the formula: (a/b) * (c/d) - 1, where a is the number of items bought, b is the cost for those items, c is the number of items sold, and d is the selling price for those items. This trick directly yields the profit percentage. The video uses a digital whiteboard to write out the calculations and formulas, and the instructor explains each step clearly.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a title card for a problem from an Infosys exam, asking to find the total profit or loss percentage for a transaction involving Surflexcel pouches. The instructor, Yash Jain Sir, introduces the problem: a man purchases 11 pouches for 10 rupees and sells 10 pouches for 11 rupees. He states that the question is from the Infosys exam (2010) and will be solved using a traditional method. The on-screen text clearly presents the problem statement and the instructor's name and channel, Knowledge Gate Educator.

  2. 2:00 – 5:00 02:00-05:00

    The instructor begins the 'traditional method' of solving the problem. He writes on a digital whiteboard, first calculating the cost price (CP) per pouch as 10/11 rupees and the selling price (SP) per pouch as 11/10 rupees. He then explains that to find the overall profit, he needs a common number of pouches. He calculates the total cost for 110 pouches (110 * 10/11 = 100 rupees) and the total selling price for 110 pouches (110 * 11/10 = 121 rupees). The profit is 121 - 100 = 21 rupees. The profit percentage is then calculated as (21/100) * 100 = 21%.

  3. 5:00 – 8:37 05:00-08:37

    The instructor introduces a 'short trick' to solve the problem in 2-3 seconds. He writes the formula: (a/b) * (c/d) - 1, where a=11 (pouches bought), b=10 (cost), c=10 (pouches sold), d=11 (selling price). He substitutes the values: (11/10) * (10/11) - 1 = 1 - 1 = 0. He then explains that this is incorrect and corrects the formula to (a/b) * (d/c) - 1, which gives (11/10) * (11/10) - 1 = 121/100 - 1 = 21/100 = 21%. He confirms the answer is 21% profit. The video ends with a 'Thanks for Watching' screen.

The video effectively teaches a common aptitude test problem by first presenting a detailed, step-by-step traditional method to build a solid understanding of the underlying concepts of cost price, selling price, and profit percentage. It then transitions to a more efficient 'short trick' method, demonstrating how to apply a formula to solve the same problem quickly. This progression from foundational understanding to a time-saving technique is a classic pedagogical approach for exam preparation, ensuring students can both understand the logic and apply a fast solution under time pressure.

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