Exercise 12.1 Full | Class 9 Maths Chapter 12 Statistics 🔥 Histogram & Frequency Polygon | Faiz Sir

इस वीडियो में Class 9 Maths | Chapter 12 – Statistics (NCERT) के Exercise 12.1 के सभी बचे हुए प्रश्न (Last Part) को step-by-step और आसान भाषा में समझाया गया है। 👨‍🏫 By: Faiz Sir (M.Sc. Maths with CS) 📚 Channel: Infinix Classes Maths 🔹 इस वीडियो में क्या-क्या पढ़ाया गया है? ✔ Histogram कैसे बनाते हैं (continuous class intervals के साथ) ✔ Histogram से जुड़े conceptual questions ✔ Frequency Polygon (single & double) ✔ Two sections / two teams का graphical comparison ✔ Real-life data based questions (leaves length, neon lamps, cricket runs, park survey, surnames) ✔ NCERT exam-oriented approach 📘 Discussed Questions – Exercise 12.1: Leaves length data → Histogram & analysis Neon lamps lifetime → Histogram & calculation Two sections marks → Frequency Polygon comparison Cricket match runs → Frequency Polygon Park survey data → Histogram Surnames letters data → Histogram & highest frequency class 👉 यह वीडियो Board Exams, School Tests और Concept Clarity के लिए बहुत उपयोगी है। 📌 अगर आपने Part-1 नहीं देखा है तो पहले वह जरूर देखें। 👍 Video पसंद आए तो Like, Share और Subscribe जरूर करें। #class9maths #StatisticsClass9 #Chapter12Statistics #Exercise12_1 #histogram #FrequencyPolygon #ncertmaths #cbseclass9 #boardexampreparation #infinixclasses #faizsir #mathsbyfaizsir #StatisticsForClass9 #hindimaths #ncertsolutions class 9 maths statistics, chapter 12 statistics class 9, exercise 12.1 statistics, histogram class 9, frequency polygon class 9, statistics ncert class 9, class 9 maths exercise 12.1, cbse class 9 maths, statistics full exercise, histogram questions class 9, frequency polygon questions, ncert statistics solutions, hindi medium maths class 9, maths by faiz sir, infinix classes maths, board exam maths preparation, class 9 maths hindi english, statistics graphs class 9, exam oriented maths class 9 EXERCISE 12.1 4. The length of 40 leaves of a plant are measured correct to one millimetre, and the obtained data is represented in the following table: (i) Draw a histogram to represent the given data. [Hint: First make the class intervals continuous] (ii) Is there any other suitable graphical representation for the same data? (iii) Is it correct to conclude that the maximum number of leaves are 153 mm long? Why? 5. The following table gives the life times of 400 neon lamps: (i) Represent the given information with the help of a histogram. (ii) How many lamps have a life time of more than 700 hours? 6. The following table gives the distribution of students of two sections according to the marks obtained by them: Represent the marks of the students of both the sections on the same graph by two frequency polygons. From the two polygons compare the performance of the two sections. 7. The runs scored by two teams A and B on the first 60 balls in a cricket match are given below: Represent the data of both the teams on the same graph by frequency polygons. [Hint : First make the class intervals continuous.] 8. A random survey of the number of children of various age groups playing in a park was found as follows: Draw a histogram to represent the data above. 9. 100 surnames were randomly picked up from a local telephone directory and a frequency distribution of the number of letters in the English alphabet in the surnames was found as follows: (i) Draw a histogram to depict the given information. (ii) Write the class interval in which the maximum number of surnames lie.