Practice set 7.3 algebra 9th

Here, we bring to you detailed answers to the 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.

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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There are 40 students in a class, out of them 15 are boys.

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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. Solution: Let the upper class limit be x and the lower class limit be y. Question 4. Complete the following table.

Practice set 7.3 algebra 9th

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.

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From the prepared table, answer the following questions: i. In the following table, the information is given about the number of families and the siblings in the families less than 14 years of age. The amount in rupees were as follows: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , i. How many students scored more than 15 marks? Question Here, we bring to you detailed answers to the exercises of Chapter 7 Statistics. Yes, these solutions can be very helpful. Then they can refer back to the solutions to analyse their performance. Using the data in example 3 above, prepare less than type cumulative frequency table and answer the following questions. Question 6. Maharashtra State Board Books For 12th. Solution: i.

Exercise 7. The lucid presentation of concepts in easy-to-understand language makes the NCERT Textbooks one of the best study materials for students.

If this is replaced by70 keeping all other observations same, find the new mean. Find the mean of yield per acre. While adding first 18 observations and last 18 observations, we add 18 th observation twice so,. Find the cumulative frequency of the class Meanwhile, the questions and the solutions are also available online on our webpage. The median of these observations is Find the mean, median and mode of the data. How many students, have scored marks less than 80? If the classes are , , … then in which class should the observation 10be included? How many students obtained less than 60 marks? The following table shows the number of Buses and Trucks in nearest lakh units. How many students scored 15 marks? 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. By visiting a certain class, gathering information about attendance of students.