Find Profit & Loss Percent

Duration: 10 min

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Inside: a video lesson and guided study material.

Module outline

  1. About the Course: About the Course
  2. Paper-1 & 2 | Basic Numeracy: अनुपात और समानुपात / Ratio and Proportion, Divisibility Rules, मिश्रण और एलिगेशन / Mixture and Alligation, Permutation and Combination, Logarithm, संख्या पद्धति / Number System, महत्तम समापवर्तक और लघुत्तम समापवर्त्य / HCF and LCM, Sequence and Series (Series), समय, चाल और दूरी / Time, Speed and Distance, प्रतिशत / Percentage, औसत / Average, घन क्षेत्रमिति / Solid Mensuration, Age Problems, Arithmetic, Statistics, Probability, लाभ, हानि और बट्टा / Profit, Loss and Discount, साधारण और चक्रवृद्धि ब्याज / Simple and Compound Interest, Partnership, Speed Mathematics and Basic Mathematics, Algebra, सरलीकरण, घातांक और करणी / Simplification, Indices and Surds, समय और कार्य / Time and Work, Pipe and Cistern, RSSB Specific Videos - Basic Numeracy, समुच्चय, संबंध, फलन और विविक्त गणित / Sets, Relations, Functions and Discrete Mathematics, संख्या पद्धति और संख्या सिद्धांत / Number Systems and Number Theory, निर्देशांक ज्यामिति, सदिश और त्रिविमीय ज्यामिति / Coordinate Geometry, Vectors and 3D Geometry, बहुपद, समीकरण और सम्मिश्र संख्याएँ / Polynomials, Equations and Complex Numbers
  3. Paper-1 & 2 | Data Interpretation: आँकड़ा निर्वचन / Data Interpretation
  4. Paper-1 & 2 | General Mental Ability: Mental Ability, RSSB Specific Videos - Mental Ability
  5. Paper-1 & 2 | Logical Reasoning and Analytical Ability: श्रेणी / Series, कूट लेखन एवं कूट वाचन / Coding-Decoding, Data Sufficiency, अशाब्दिक तर्क / Non-Verbal Reasoning, Syllogisms, बैठक व्यवस्था एवं पहेलियाँ / Seating Arrangement and Puzzles, रक्त संबंध / Blood Relations, दिशा एवं दूरी / Direction and Distance, Analytical Reasoning (Counting Figures Reasoning), गणितीय संक्रियाएँ एवं लुप्त संख्या / Mathematical Operations and Missing Numbers, कैलेंडर एवं घड़ी / Calendar and Clock, Clock, घन, पासा एवं आकृतियों की गिनती / Cubes, Dice and Figure Counting, वेन आरेख, न्याय वाक्य एवं असमानता / Venn Diagrams, Syllogism and Inequalities, सादृश्यता एवं वर्गीकरण / Analogy and Classification, क्रम एवं रैंकिंग / Order and Ranking, कथन आधारित तार्किक विवेचन / Statement-Based Reasoning, Data Arrangement, वर्णमाला एवं संख्या परीक्षण / Alphabet and Number Test, Crypt Arithmetic
  6. Paper-1 & 2 | Decision Making and Problem Solving: आँकड़ों की पर्याप्तता एवं निर्णय क्षमता / Data Sufficiency and Decision Making
  7. Paper-1 | General Science: वैज्ञानिक उपलब्धियाँ और अनुसंधान / Scientific Achievements and Research, Biology, Chemistry, RSSB Specific Videos
  8. Paper-1 | General Awareness: राज्य विशेष सामान्य ज्ञान / State-Specific General Knowledge, समसामयिकी / Current Affairs
  9. Paper - 2 | Digital Logic Systems: Digital Systems & Boolean Basics, Logic Gates & Hardware, Combinational Circuit, Sequential Circuits
  10. Paper-2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Calculus, Relational Algebra, SQL, NoSQL
  11. Paper-2 | Data Structures & Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Algorithm Analysis, Sorting Algorithms, Intro to Compilers, Hashing
  12. Paper 2 | Data Communication and Network Security: Introduction to CN, Data Communication, Data Link Layer - Ethernet, DLL: Error Control, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Application Layer, Hardware basics, Network Security, Ethical Hacking
  13. Paper-2 | Operating Systems: Introduction to OS, Process Management, Memory Management, File Management, Deadlock
  14. Paper-2 | Computer Organization and Architecture: Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations, Programming the Basic Computer, Number System, Number Representation
  15. Paper 2 | System Analysis and Design: Fundamentals of Systems and Information Systems, Fundamentals of Software Engineering, SDLC and Development Approaches, Software Documentation and Software Requirements Specification (SRS), SDD and Quality Assurance, Security, Risk Management & Maintenance, Software Testing
  16. Paper-2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  17. Paper 2 | OOPS , C++ , JAVA: Language Design, OOPS with C++, Java, .Net Programming, Java Fundamentals
  18. Paper 2 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  19. Emerging Trends and AI: Emerging Tech Trends, कंप्यूटर के मूल सिद्धांत / Computer Fundamentals, व्यापार, विपणन एवं उपभोक्ता संरक्षण / Trade, Marketing and Consumer Protection
  20. Paper-2 | Data Processing (Ms-Office): MS Office Applications, कंप्यूटर सॉफ़्टवेयर / Computer Software, ऑपरेटिंग सिस्टम / Operating System, वर्ड प्रोसेसिंग (MS Word) / Word Processing (MS Word), प्रेज़ेंटेशन (MS PowerPoint) / Presentation Software (MS PowerPoint)
  21. Paper-2 | Internet and Web Technologies: HTML Basics, CSS, XML, JavaScript-Basics, Internet Fundamentals, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, Terms & Abbreviations, Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing, साइबर सुरक्षा / Cyber Safety and Security, कंप्यूटर नेटवर्क / Computer Networks
  22. Paper 2 | Pedagogy: वृद्धि और विकास / Growth and Development, विकास के सिद्धांत / Theories of Development, Concept of Pedagogy, समावेशी शिक्षा / Inclusive Education, Experiential Pedagogy, आकलन और मूल्यांकन / Assessment and Evaluation, संज्ञानात्मक प्रक्रियाएँ / Cognitive Processes, समाजीकरण और जेंडर / Socialisation and Gender, National Education Policy (NEP) 2020
  23. Live Classes: RSSB Live Sessions
  24. Paper 1 - Full Mock Tests:
  25. Paper 2 - Full Mock Tests:
  26. BCI Previous Year Papers:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video is a tutorial on solving profit and loss problems, presented by a teacher from Knowledge Gate. The video begins with a conceptual image of a balance scale, symbolizing the core idea of balancing profit and loss. The main content consists of two problems. The first problem, presented as a question from the AMCAT exam, involves calculating the new profit or loss percentage when the selling price and quantity change, given an initial 20% loss. The instructor uses a method of equating the cost price (CP) across both scenarios to find the new profit percentage, which is determined to be a 60% loss. The second problem, from an Accenture exam, asks for the number of bananas to be sold at a new price to achieve a 20% profit, given an initial 30% loss. The instructor solves this by first finding the cost price per banana and then calculating the required quantity. The video uses a digital whiteboard for all calculations and includes on-screen text for the questions and branding.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a conceptual image of a white 3D figure standing on a balance scale, with the word "PROFIT" in green on the left side and "LOSS" in red on the right, visually representing the core concept of profit and loss. This transitions to a screen displaying a question from the AMCAT exam: "Dr. Salunkhe of CID encounters 20% loss on selling 50 Corona Vaccine at Rs. 600. Now on selling 80 Vaccines for Rs. 480, what is the loss percent or profit percent?" The instructor, visible in a small window, introduces the problem, which is presented as an important question from the 2019 AMCAT exam. The on-screen text also includes a humorous news headline about Dr. Salunkhe and Neha Dhupia, and a note about a quiz on previous year IT companies at the end of the video.

  2. 2:00 – 5:00 02:00-05:00

    The instructor begins solving the first problem on a digital green chalkboard. He starts by writing the formula for cost price (CP) in terms of selling price (SP) and loss percentage: CP = (SP / (100 - Loss%)) * 100. He then calculates the cost price for the first scenario: CP = (600 / (100 - 20)) * 100 = (600 / 80) * 100 = 750. He then sets up an equation to find the new profit or loss percentage (x) for the second scenario, where 80 vaccines are sold for Rs. 480. The equation is: 750 = (480 / (100 + x)) * 100. He simplifies this to 7.5 = 480 / (100 + x), then 7.5 * (100 + x) = 480, which becomes 750 + 7.5x = 480. Solving for x, he gets 7.5x = -270, and finally x = -36. This indicates a loss of 36%. However, the instructor then re-evaluates the calculation, and the final answer shown on the board is a 60% loss, suggesting a different approach or a correction in the calculation process.

  3. 5:00 – 9:33 05:00-09:33

    The instructor moves to the second problem, which is displayed on screen: "On selling 60 bananas at Rs. 210, a shopkeeper encounters 30% loss. On selling how many bananas at Rs. 180, the shopkeeper will gain 20% profit?" He begins by calculating the cost price (CP) for the first scenario using the formula CP = (SP / (100 - Loss%)) * 100. He calculates CP = (210 / (100 - 30)) * 100 = (210 / 70) * 100 = 300. This is the total cost price for 60 bananas. He then calculates the cost price per banana as 300 / 60 = Rs. 5. To achieve a 20% profit, the selling price (SP) per banana must be CP * (100 + Profit%) / 100 = 5 * 120 / 100 = Rs. 6. The new selling price for the entire lot is given as Rs. 180. Therefore, the number of bananas that can be sold at Rs. 6 each to get Rs. 180 is 180 / 6 = 30. The instructor writes the final answer as 30 bananas. The video concludes with a "THANKS FOR WATCHING" screen.

The video provides a structured, step-by-step tutorial on solving profit and loss problems, a common topic in quantitative aptitude exams. It demonstrates two distinct problem types: one where the cost price is constant and the profit/loss percentage is to be found, and another where the cost price is derived from one scenario to find a required quantity in a different scenario. The core method involves using the fundamental formulas for cost price and selling price, and the instructor emphasizes the importance of setting up correct equations. The progression from a conceptual image to two detailed, worked examples effectively reinforces the application of these formulas in different contexts.

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