Practice Questions

Duration: 8 min

This video lesson is available to enrolled students.

Return to /learn/BIHAR-STET-COMPUTER-SCIENCE-COMPLETE-COURSE/mathematical-aptitude/profit-and-loss/discount-marked-price-and-trader-tricks-including-false-weight/asset-practice-questions-6542 after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About the course: About the Course
  2. Mathematical Aptitude / गणितीय अभिक्षमता: Number System / संख्या पद्धति, HCF and LCM / महत्तम समापवर्तक और लघुत्तम समापवर्त्य, Divisibility Rules / विभाज्यता के नियम, Percentage / प्रतिशत, Ratio and Proportion / अनुपात और समानुपात, Average / औसत, Profit, Loss and Discount / लाभ, हानि और बट्टा, Time and Work / समय और कार्य, Solid Mensuration / घन क्षेत्रमिति, Simple and Compound Interest / साधारण और चक्रवृद्धि ब्याज, Time, Speed and Distance / समय, चाल और दूरी, Age Problems / आयु संबंधी प्रश्न, Mixture and Alligation / मिश्रण और एलिगेशन, Algebra / बीजगणित, Simplification, Indices and Surds / सरलीकरण, घातांक और करणी, Pipe and Cistern / नल और टंकी, Trigonometry / त्रिकोणमिति, Statistics / सांख्यिकी, Data Interpretation / आँकड़ा निर्वचन, Arithmetic / अंकगणित, Sets, Relations, Functions and Discrete Mathematics / समुच्चय, संबंध, फलन और विविक्त गणित, Number Systems and Number Theory / संख्या पद्धति और संख्या सिद्धांत, Coordinate Geometry, Vectors and 3D Geometry / निर्देशांक ज्यामिति, सदिश और त्रिविमीय ज्यामिति, Polynomials, Equations and Complex Numbers / बहुपद, समीकरण और सम्मिश्र संख्याएँ
  3. Logical Reasoning / तार्किक तर्कशक्ति: Series / श्रेणी, Coding-Decoding / कूट लेखन एवं कूट वाचन, Analogy and Classification / सादृश्यता एवं वर्गीकरण, Blood Relations / रक्त संबंध, Direction and Distance / दिशा एवं दूरी, Order and Ranking / क्रम एवं रैंकिंग, Non-Verbal Reasoning / अशाब्दिक तर्क, Seating Arrangement and Puzzles / बैठक व्यवस्था एवं पहेलियाँ, Syllogisms / न्यायवाक्य, Venn Diagrams, Syllogism and Inequalities / वेन आरेख, न्याय वाक्य एवं असमानता, Mathematical Operations and Missing Numbers / गणितीय संक्रियाएँ एवं लुप्त संख्या, Alphabet and Number Test / वर्णमाला एवं संख्या परीक्षण, Statement-Based Reasoning / कथन आधारित तार्किक विवेचन, Analytical Reasoning (Counting Figures Reasoning) / विश्लेषणात्मक तर्क (आकृति गणना तर्क), Cubes, Dice and Figure Counting / घन, पासा एवं आकृतियों की गिनती, Calendar and Clock / कैलेंडर एवं घड़ी, Clock / घड़ी
  4. General Knowledge / सामान्य ज्ञान: Scientific Achievements and Research / वैज्ञानिक उपलब्धियाँ और अनुसंधान, Chemistry / रसायन विज्ञान, Biology / जीव विज्ञान, History / इतिहास, Geography / भूगोल, Polity / राजव्यवस्था, Indian Economy / भारतीय अर्थव्यवस्था, Current Affairs / समसामयिकी, Static General Knowledge / स्थैतिक सामान्य ज्ञान, State-Specific General Knowledge / राज्य विशेष सामान्य ज्ञान
  5. Art of Teaching / शिक्षण कला: Teaching-Learning Process and Classroom Management / शिक्षण-अधिगम प्रक्रिया एवं कक्षा प्रबंधन, Learners & Learning Process / अधिगमकर्ता और अधिगम प्रक्रिया, Factors Affecting Teaching / शिक्षण को प्रभावित करने वाले कारक, Teaching Methods and Approaches / शिक्षण विधियाँ एवं उपागम, Microteaching and Classroom Communication / सूक्ष्म शिक्षण एवं कक्षा संप्रेषण, Teaching Aids and Educational Technology / शिक्षण सहायक सामग्री एवं शैक्षिक तकनीकी, Assessment and Evaluation / आकलन एवं मूल्यांकन, Teacher: Qualities, Professional Ethics and Development / शिक्षक: गुण, व्यावसायिक नैतिकता एवं विकास, Educational Policies, Acts and Administration / शैक्षिक नीतियाँ, अधिनियम एवं प्रशासन, Curriculum, Arts and Co-curricular Areas / पाठ्यचर्या, कला एवं सह-शैक्षिक क्षेत्र, Guidance and Counselling / निर्देशन एवं परामर्श, Education of Children with Disabilities / दिव्यांग बच्चों की शिक्षा, Micro-Teaching & Teaching Skills / सूक्ष्म शिक्षण और शिक्षण कौशल, Lesson Planning / पाठ योजना
  6. Environmental Science / पर्यावरण विज्ञान: Environment / पर्यावरण
  7. Unit 1 | Digital Electronics: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation
  8. Unit 2 | COA: 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
  9. Unit 3 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  10. Unit 3 | Data Structures: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  11. Unit 4 | Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Advanced Algorithms
  12. Unit 5 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management
  13. Unit 6 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, SQL, Transaction Management, Concurrency Control
  14. Unit 7 | Computer Networks: 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
  15. Unit 8 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  16. Unit 9 | Object Oriented Programming: OOPS with C++
  17. Unit 10 | Web Development: HTML Basics, CSS, JavaScript-Basics, XML, Node.js, Git & Github, PHP
  18. Unit 11 | Theory Of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines
  19. Unit 12 | IoT: Emerging Tech Trends, Cloud Computing, Computer Networks, Internet of Things
  20. Unit 13 | Artificial Intelligence: Approaches to AI, Search Algorithms, Game Playing, Knowledge Representation, Natural Language Processing, Artificial Neural Networks, Genetic Algorithms
  21. Unit 14 | E-Commerce: Electronic Data Interchange and E-Commerce, Role of Internet and Web Services, Security in Mobile and Wireless Computing, Physical Security and Cryptography Basics, Cyber Safety and Security
  22. Unit 15 | Multimedia: Multimedia
  23. Unit 16 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis, DSA using Python
  24. Full Length Mock Tests — General Paper:
  25. Full Length Mock Tests — Computer Science (Paper II):
  26. Full Length Mock Test – General + Computer Science:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video presents a step-by-step solution to two quantitative aptitude problems related to profit and loss, using a digital whiteboard. The first problem, from an Accenture exam, involves calculating the percentage profit or loss for a pen dealer who buys 9 pens for 16 rupees and sells them at an offer of 11 pens for 20 rupees. The instructor demonstrates a method to find the cost price (CP) and selling price (SP) per pen by equating the total cost and revenue for a common number of pens (180), leading to a calculated profit of 25/11%, or approximately 2.27%. The second problem, from a GATE exam, asks for the loss incurred by a fruit seller who sold a basket at a 12.5% loss, and if he had sold it for Rs. 108 more, he would have made a 10% gain. The instructor uses the ratio method, setting the cost price (CP) as 100 units, which results in a selling price (SP) of 87.5 units for a 12.5% loss and 110 units for a 10% gain. The difference of 22.5 units is equated to Rs. 108, allowing the calculation of the CP as Rs. 480 and the loss as Rs. 60. 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 for a question from an Accenture exam. The problem states: 'Sunny deal purchases 9 pens in 16 rupees and sell it at a offer of 11 pens for 20 rupees. How much percentage profit or loss he received?'. The instructor begins the solution by writing 'Qty' and 'Rs.' on a digital whiteboard, then sets up the purchase and sale data: 9 pens for 16 rupees and 11 pens for 20 rupees. He explains that to compare the cost and selling price, a common number of pens must be used. He calculates the least common multiple of 9 and 11, which is 99, but then uses 180 (a multiple of 9 and 11) to make the calculations easier. He writes '20*9=180' and '11*16=176', indicating that the cost for 180 pens is 180 rupees and the selling price for 180 pens is 176 rupees. He then writes the formula for profit percentage: 'Profit = (SP - CP) / CP * 100'. He also notes that the cost price for 180 pens is 180 rupees and the selling price is 176 rupees, which implies a loss of 4 rupees on 180 rupees. He then begins to write the formula for percentage loss: '180 - 176 / 176 * 100'.

  2. 2:00 – 5:00 02:00-05:00

    The instructor continues solving the first problem. He writes the formula for percentage loss as '(180 - 176) / 176 * 100', which simplifies to '4 / 176 * 100'. He then simplifies the fraction '4/176' to '1/44'. He writes '1/44 * 100' and calculates the result as '100 / 44', which simplifies to '25 / 11'. He states that the percentage loss is 25/11%, which is approximately 2.27%. He then moves to the second problem, which is from a GATE exam. The problem states: 'A fruit seller sold a basket of fruits at 12.5% loss. Had he sold it for Rs. 108 more, he would have made a 10% gain. What is the loss in Rupees incurred by the fruit seller?'. He introduces the 'Ratio Method' as a shortcut. He writes 'CP = 100' and 'L = 12.5%'. He explains that a 12.5% loss means the selling price (SP) is 87.5% of the cost price. He writes 'SP = 87.5'. He then writes 'G = 10%' and 'SP = 110'. He explains that the difference between the two selling prices is 110 - 87.5 = 22.5. He equates this difference to Rs. 108. He writes '22.5 = 108' and '100 = ?'. He calculates the cost price (CP) as (108 / 22.5) * 100 = 480. He then calculates the loss as 12.5% of 480, which is 60. He concludes that the loss incurred by the fruit seller is Rs. 60.

  3. 5:00 – 8:18 05:00-08:18

    The instructor continues to solve the second problem using the 'Percentage Method'. He writes 'CP = 100' and 'L = 12.5%'. He explains that a 12.5% loss means the selling price (SP) is 87.5% of the cost price. He writes 'SP = 87.5'. He then writes 'G = 10%' and 'SP = 110'. He explains that the difference between the two selling prices is 110 - 87.5 = 22.5. He equates this difference to Rs. 108. He writes '22.5 = 108' and '100 = ?'. He calculates the cost price (CP) as (108 / 22.5) * 100 = 480. He then calculates the loss as 12.5% of 480, which is 60. He concludes that the loss incurred by the fruit seller is Rs. 60. The video ends with a 'Thanks for Watching' screen.

The video provides a clear, structured walkthrough of two profit and loss problems, emphasizing different solution methods. The first problem is solved by finding a common quantity to compare cost and selling prices, leading to a calculation of percentage loss. The second problem is solved using the ratio method, where the cost price is assumed as 100 units, and the difference in selling prices is used to find the actual cost and the loss. The instructor effectively uses a digital whiteboard to show all calculations step-by-step, making the concepts accessible for students preparing for competitive exams.

Loading lesson…