Practice set 7.3 algebra 9th

Here, we bring to you detailed answers to the exercises of Chapter 7 Statistics.

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.

Practice set 7.3 algebra 9th

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In the village Nandpur, the information collected from every house regarding students not attending school. How many students scored less than 15 marks? What is the upper-class limit for the class ?

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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.

Practice set 7.3 algebra 9th

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.

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For class interval write the lower-class limit and the upper-class limit. By taking suitable classes, prepare the grouped frequency distribution table The median is the middle number in a data set when the numbers are listed in either ascending or descending order. Yes, we provide the solutions to download. 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. There are 10 observations arranged in ascending order as given below. Let the lower class limit and upper class limit of the class mark 22 be x andy respectively. We have also provided the solutions as a scrollable PDF and we have also mentioned the clickable link for the students to access. How many students obtained less than 40 marks? Mode is the most frequently occurring observation. In a basket there are 10 tomatoes. Review the cleanliness status of canals by actually visiting them. The data collected was as follows. Question 1. How many students have scored marks less than 60?

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.

Question 4. What is the cumulative frequency of equal to or more than type of the class ? Here, we bring to you detailed answers to the exercises of Chapter 7 Statistics. Did not receive OTP? For class interval 20 — 25 write the lower class limit and the upper class limit. There are 68 students of 9th standard from model Highschool, Nandpur. The record of marks out of 20 in Mathematics in the first unit test is as follows: 20,6, 14, 10, 13, 15, 12, 14, From the data, we observe that 9 students have got 35 and 37 marks which is the highest so mode is 35 and 37 marks. 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. In a school, 46 students of 9th standard, were told to measure the lengths of the pencils in their compass-boxes in centimetres.