Practice set 7.3 algebra 9th

Here, we bring to you detailed answers to practice set 7.3 algebra 9th exercises of Chapter 7 Statistics. Subject matter experts who created the solutions have collected these questions for you to revise from the chapter 7 of 9th Maths Maharashtra Board Textbook. This chapter of Maharashtra State Board Class 9 Solutions deals with sub-divided bar-diagram, Grouped and ungrouped frequency distribution, Percentage bar-diagram, practice set 7.3 algebra 9th, Cumulative frequency distribution, Primary and secondary data, Mean, Median and Mode for ungrouped data and data collection. The following table shows the number of Buses and Trucks in nearest lakh units.

Question 1. For class interval 20 — 25 write the lower class limit and the upper class limit. Question 2. Find the class-mark of the class Question 3. If class-mark is 10 and class width is 6, then find the class.

Practice set 7.3 algebra 9th

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Approximate the percentages to the nearest integer. For class interval 20 — 25 write the lower class limit and the upper class limit.

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Prove that:. Show that:. Ans: It is given that. Sides opposite to equal angles of a triangle are equal. Show that these altitudes are equal. Show that. Ans: It is given that:.

Practice set 7.3 algebra 9th

Exercise 7. The lucid presentation of concepts in easy-to-understand language makes the NCERT Textbooks one of the best study materials for students. To help students understand the important topics given in the chapters, each chapter has exercise questions in the middle and at the end of the chapter. All the solutions are presented in a detailed manner to help students easily understand the concepts. Here, students can check the solutions to Exercise 7. Practicing these questions will help students in the examination, as most of the questions in examinations are asked from NCERT textbooks. Students can use these NCERT solutions to gain an understanding of the detailed method of solving exercise questions. Try Your Luck! Top 10 Highest Mountain Ranges in the World. Optical Illusion Eye Test: Find the bird in the picture in 4 seconds!

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The mean of 35 observations is 20, out of which mean of first 18 observations is 15and mean of last 18 observation is Primary data, because the data is collected by the investigator himself by going in every class. Find the salary of the office superintendent. The median is the middle number in a data set when the numbers are listed in either ascending or descending order. How many students scored 15 marks? To get information regarding plantation of soybean done by each farmer from the village Talathi. What is the cumulative frequency of equal to or more than type of the class ? There are 10 observations arranged in ascending order as given below. Question 3. The weights of 10 students in kg are given below: 40, 35, 42, 43, 37, 35, 37, 37, 42, These classes are exclusive in nature which means the classes are continuous.

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These classes are exclusive in nature which means the classes are continuous. How many students obtained marks 60 or above 60? Question 9. Find the number added in the data. Are these Maharashtra Board Class 9 Solutions useful to prepare for the exams? How many students have scored marks 30 or more than 30? FREE Signup. Following 10 observations are arranged in ascending order as follows. Primary data, because the data is collected by the investigator himself by going in every class. The Mean, Median and Mode are the arithmetic average of a data set. What is the class-mark of class ? Using the data in example 3 above, prepare less than type cumulative frequency table and answer the following questions. Secondary data, because the data is collected by some other person and is being used by investigator. In a village, the milk was collected from 50 milkmen at a collection center in litres as given below: 27, 75, 5, 99, 70, 12, 15, 20, 30, 35, 45, 80, 77, 90, 92, 72, 4, 33, 22, 15, 20, 28, 29, 14, 16, 20, 72, 81, 85, 10, 16, 9, 25, 23, 26, 46, 55, 56, 66, 67, 51, 57, 44, 43, 6, 65, 42, 36, 7, 35 By taking suitable classes, prepare grouped frequency distribution table. The mean salary of 20 workers is Rs.