Find Profit & Loss Percent

Duration: 10 min

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Inside: a video lesson and guided study material.

Module outline

  1. Child Development and Pedagogy: विकास की अवधारणा / Concept of Development, विकास के मनोवैज्ञानिक सिद्धांत / Psychological Theories of Development, व्यक्तिगत भिन्नताएँ, व्यक्तित्व एवं जेंडर / Individual Differences, Personality and Gender, बुद्धि एवं सृजनात्मकता / Intelligence and Creativity, अधिगम एवं इसके सिद्धांत / Learning and Its Theories, बालक कैसे सोचते एवं सीखते हैं / How Children Think and Learn, संवेग, अभिप्रेरणा, मानसिक स्वास्थ्य एवं निर्देशन / Emotion, Motivation, Mental Health and Guidance, समावेशी शिक्षा / Inclusive Education, शिक्षण-अधिगम प्रक्रिया / Teaching-Learning Process, शिक्षण विधियाँ एवं रणनीतियाँ / Teaching Methods and Strategies, आकलन एवं मूल्यांकन / Assessment and Evaluation, पाठ्यचर्या और विद्यालयी गतिविधियाँ / Curriculum and School Activities, पाठ योजना और शिक्षण कौशल / Lesson Planning and Teaching Skills, शिक्षण संसाधन और शैक्षिक प्रौद्योगिकी / Teaching Resources and Educational Technology, कक्षा प्रबंधन और सम्प्रेषण / Classroom Management and Communication, शिक्षक पहचान और व्यावसायिक विकास / Teacher Identity and Professional Development, शैक्षिक विचारक, उद्देश्य एवं राष्ट्रीय नीतियाँ / Educational Thinkers, Aims and National Policies, विद्यालय नेतृत्व और प्रशासन / School Leadership and Administration, जीवन कौशल, मूल्य, शांति एवं पर्यावरण शिक्षा / Life Skills, Values, Peace and Environmental Education, पर्यावरण अध्ययन का शिक्षणशास्त्र / Pedagogy of Environmental Studies, विज्ञान शिक्षण शास्त्र / Science Pedagogy, संविधान, आयोग, अधिनियम एवं योजनाएँ / Constitution, Commissions, Acts and Schemes in Education, कंप्यूटर हार्डवेयर एवं परिधीय उपकरण / Computer Hardware and Peripherals
  2. Language I — Hindi: भाषा, लिपि और वर्ण-विचार, संधि, शब्द-स्रोत और शब्द-रचना, समास, शब्द-भेद: विकारी और अविकारी, लिंग, वचन, कारक, काल और वाच्य, वाक्य-विचार और शुद्ध लेखन, शब्द-भंडार, रस, छंद, अलंकार और शब्द-शक्ति, हिंदी साहित्य, अपठित बोध, हिंदी शिक्षणशास्त्र
  3. Language II — English: Sounds, Spelling and Word Formation, Parts of Speech, Nouns and Pronouns, Articles, Determiners and Adjectives, Verbs and Modals, Tenses and Subject–Verb Agreement, Adverbs, Prepositions and Conjunctions, Sentence Structure, Voice and Narration, Vocabulary, Sentence Correction and Writing Skills, Poetry and English Literature, Reading Comprehension, Pedagogy of English Language
  4. Language II — Urdu: رسم الخط، املا اور تلفظ, ذخیرۂ الفاظ, قواعد, محاورے اور ضرب الامثال, شعر و سخن, اردو ادب کی تاریخ, تفہیمِ عبارت, اردو کی تدریس
  5. Language II — Sanskrit: वर्णविचारः एवं संज्ञाप्रकरणम्, सन्धिप्रकरणम्, शब्दरूपाणि, धातुरूपाणि, कारकाणि एवं विभक्तयः, उपसर्गाः एवं अव्ययानि, प्रत्ययप्रकरणम्, समासप्रकरणम्, वाच्यप्रकरणम्, संख्याज्ञानम्, शब्दज्ञानम् एवं अनुवादः, अपठितावबोधनम्, संस्कृतसाहित्यम् एवं काव्यशास्त्रम्, संस्कृतशिक्षणशास्त्रम्
  6. Mathematics: संख्या पद्धति एवं स्थानीय मान / Number System & Place Value, मूलभूत संक्रियाएँ, सरलीकरण एवं पैटर्न / Basic Operations, Simplification & Patterns, गुणनखंड, विभाज्यता, म.स.प. एवं ल.स.प. / Factors, Divisibility, HCF & LCM, भिन्न एवं दशमलव / Fractions & Decimals, वर्ग, घन, घातांक एवं करणी / Squares, Cubes, Exponents & Surds, मापन: लंबाई, भार, धारिता, समय एवं मुद्रा / Measurement: Length, Mass, Capacity, Time & Money, बीजगणित / Algebra, अनुपात, समानुपात, औसत एवं आयु / Ratio, Proportion, Average & Ages, प्रतिशत, लाभ-हानि एवं ब्याज / Percentage, Profit–Loss & Interest, समय-कार्य एवं चाल-दूरी / Time & Work and Speed–Distance, रेखाएँ, कोण, आकृतियाँ एवं निर्देशांक / Lines, Angles, Shapes & Coordinates, त्रिभुज, चतुर्भुज, वृत्त एवं त्रिकोणमिति / Triangles, Quadrilaterals, Circles & Trigonometry, क्षेत्रमिति: परिमाप, क्षेत्रफल एवं आयतन / Mensuration: Perimeter, Area & Volume, आँकड़ा प्रबंधन, सांख्यिकी एवं प्रायिकता / Data Handling, Statistics & Probability, गणित शिक्षणशास्त्र / Mathematics Pedagogy
  7. Science: प्रौद्योगिकी, मापन एवं गति / Technology, Measurement and Motion, बल, दाब, कार्य एवं ऊर्जा / Force, Pressure, Work and Energy, ऊष्मा एवं ध्वनि / Heat and Sound, प्रकाश / Light, विद्युत एवं चुंबकत्व / Electricity and Magnetism, ब्रह्मांड एवं प्राकृतिक परिघटनाएँ / Universe and Natural Phenomena, पदार्थ एवं उसकी संरचना / Matter and Its Structure, रासायनिक अभिक्रियाएँ, अम्ल, क्षार एवं लवण / Chemical Reactions, Acids, Bases and Salts, धातु, अधातु एवं दैनिक उपयोग की सामग्री / Metals, Non-metals and Materials of Daily Use, सजीव जगत: वर्गीकरण, कोशिका एवं ऊतक / Living World: Classification, Cell and Tissues, पादपों में पोषण, परिवहन एवं जनन / Plants: Nutrition, Transport and Reproduction, मानव शरीर एवं अंग तंत्र / Human Body and Organ Systems, भोजन, पोषण एवं स्वास्थ्य / Food, Nutrition and Health, पर्यावरण एवं पारिस्थितिकी / Environment and Ecology, पर्यावरण, पारिस्थितिकी और वन्यजीव / Environment, Ecology and Wildlife, प्राकृतिक संसाधन, प्रदूषण और जलवायु परिवर्तन / Natural Resources, Pollution and Climate Change
  8. Social Studies/Social Science: प्राचीन भारत का इतिहास / Ancient Indian History, मध्यकालीन भारत का इतिहास / Medieval Indian History, औपनिवेशिक भारत एवं समाज सुधार / Colonial India and Social Reform, भारतीय राष्ट्रीय आंदोलन एवं स्वतंत्र भारत / Indian National Movement and Independent India, विश्व इतिहास एवं अंतरराष्ट्रीय संबंध / World History and International Relations, पृथ्वी, ग्लोब एवं मानचित्र / Earth, Globe and Maps, भौतिक भूगोल / Physical Geography, प्राकृतिक वनस्पति, वन्य जीवन एवं विश्व के प्रदेश / Natural Vegetation, Wildlife and World Regions, भारत का भूगोल / Geography of India, संसाधन एवं विकास / Resources and Development, सामाजिक एवं राजनीतिक जीवन / Social and Political Life, भारतीय संविधान / Indian Constitution, सरकार: केंद्र, राज्य एवं स्थानीय / Government: Union, State and Local, अर्थशास्त्र एवं भारतीय अर्थव्यवस्था / Economics and Indian Economy, सामाजिक विज्ञान शिक्षणशास्त्र / Social Science Pedagogy, पृथ्वी, आकाश और आपदाएँ / Earth, Sky and Disasters, उत्तर प्रदेश सामान्य ज्ञान / Uttar Pradesh GK
  9. अतिरिक्त अभ्यास / Extra Practice (beyond syllabus): भारतीय अर्थव्यवस्था: आँकड़े एवं समसामयिकी / Indian Economy: Data & Current Affairs, भारतीय कला एवं संस्कृति / Indian Art & Culture, विज्ञान एवं प्रौद्योगिकी / Science & Technology, पर्यावरण एवं जलवायु समसामयिकी / Environment & Climate Affairs, रक्षा एवं सुरक्षा / Defence & Security, स्थिर सामान्य ज्ञान / Static General Knowledge, पुरस्कार एवं सम्मान / Awards & Honours, सरकारी योजनाएँ, शासन एवं आधारभूत संरचना / Government Schemes, Governance & Infrastructure, पासा एवं घन / Dice & Cubes
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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