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.

Practice set 7.3 algebra 9th

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The Mean, Median and Mode are the arithmetic average of a data set.

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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

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.

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By using data in example 6 , and taking classes , … prepare equal to or more than type cumulative frequency table and answer the following questions based on it. What is the upper-class limit for the class ? Find the value of x. In a school, 46 students of 9th standard, were told to measure the lengths of the pencils in their compass-boxes in Centimetres. Complete the following table. The mean of marks obtained by boys is 33 and that for girls is Which of the following data is not primary? The weight of each of these tomatoes in grams is as follows 60, 70, 90, 95, 50, 65, 70, 80, 85, In a school, 46 students of 9th standard, were told to measure the lengths of the pencils in their compass-boxes in centimetres. Find the number added in the data. Let the lower class limit and upper class limit of the class mark 22 be x andy respectively. On arranging above data in ascending order, we get: 15, 15, 15, 19, 19, 20, 20,

Prove that:. Show that:.

Yes, we provide the solutions to download. The class include 0 and all the numbers less than 10 while class 10 — 20 include 10 and all the numbers less than 20 and so on. Solution: i. Find the cumulative frequency of the class Maharashtra State Board Books. A hockey player has scored following number of goals in 9 matches. What is the lowest score of the group? If one more number is added to it than the mean increases by 5. There are 40 students in a class, out of them 15 are boys. The mean of 35 observations is 20, out of which mean of first 18 observations is 15and mean of last 18 observation is Find the mean of yield per acre. 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. How many students, have scored marks less than 80? One of the observations was removed from the data, hence the mean became