Class 9 maths ex 14.3

Download NCERT Solutions for Class 9 Maths Chapter 14 Exercise 14.3 statistics in NCERT Solutions for Class 9 Maths Chapter 14 Exercise 14.3 If you need solutions in Hindi, Click for 9 Maths Chapter 14 Exercise 14.3 in Hindi To get the solutions in English, Click for Class 9 Maths Chapter 14 Statistics Important Questions for Practice [With Answers] • For what value of x the mode of the following data is 17. The frequency of x is maximum. 13, 24, 13, 27, 17, 16, 17, x, 22, 21, 13, 17. [Answer: 17] • The average of age of Shikha and her husband Amit is 48 years. The average age of Shikha, Amit and their daughter Advika is 39 years. Find the age of Advika. [Answer: 21 years] • The mean of 6, 10, 11, x, 12, y is 10. Also y is 7 more than x. Find the value of x and y. [Answer: x = 7, y = 14] • In three unit tests of • Time taken in seconds by 25 students in an examination to solve certain question is given below: 20, 16, 20, 26, 27, 28, 30, 33, 37, 50, 40, 46, 38, 43, 46, 46, 48, 49, 53, 58, 59, 60, 64, 52. By taking class interval of 10 seconds, make a frequency distribution table. • Find the mean from the following table • x 5 15 25 35 45 • f 6 4 9 6 5 [Answer: 25] • Draw the • Class 0-10 10-20 20-30 30-40 40-50 • Frequency 8 15 20 12 16 • Given below is a cumulative frequency distribution table showing the marks scored by 50 students of a class. • Marks Number of students Below 20 17 Below 40 22 Below 60 29 Below 80 37 Below 100 50 Form a frequency table from the above data...

Question 1. A survey conducted by an organisation for the cause of illness and death among the women between the ages 15 – 44 (in years) worldwide, found the following figures (in %). (i) Represent the information given above graphically. (ii) Which condition is the major cause of women’s ill health and death worldwide? (iii) Try to find out, with the help of your teacher, any two factors which play a major role in the cause in (ii) above being the major cause. Solution: (i) Scale: x axis ➝ 1 horizontal axis = 1 cm. y axis ➝ 5% = 1 cm. (ii) Reproductive health conditions. (iii) Nerve and skin. • • • Question 2. The following data on the number of girls (to the nearest ten) per thousand boys In different sections of Indian society is given below. (i) Represent the information above by a bar graph. (ii) In the classroom discuss what conclusions can be arrived at from the graph. Solution: (i) Scale: x axis ➝ 1 horizontal = 1 cm. y axis ➝ 100 girls = 1 cm. (ii) After verification we came to know that Strength of Girls is more in ST section and it is less in Urban section. Question 3. Given below are the seats won by different political parties in the polling outcome of a state assembly elections : (i) Draw a bar graph to represent the polling results. (ii) Which political party won the maximum number of seats ? (ii) A Political Party won the maximum number of seats. Solution: (i) Scale: x axis ➝ 1 horizontal(Party) = 1 cm. y axis ➝ 10 Parties = 1 cm. (ii) ‘A’ political Party w...

Table of contents In this NCERT book exercise 14.3, we will be studying concepts of Histogram which we talk about in the previous exercise during the chapter study The Class 9 Maths chapter 14 exercise 14.3 basically works on important topics like Histogram, bar graph and frequency of polygon over graphs as mentioned with terms like frequency, maximum and minimum values which cover around each and every question of the exercise. The NCERT syllabus Class 9 Maths chapter 14 exercise 14.3 covers Initial topics with examples called in terms of numerical solved. Most of the real-life questions will be discussed in NCERT solutions for Class 9 Maths Chapter 14 exercise 14.3. Along with Class 9 Maths Chapter 1 exercise 14.3, the following exercises are also present. • • • Serial Number Causes Female fatality rate (%) 1. Reproductive health conditions 31.8 2. Neuropsychiatric conditions 25.4 3. Injuries 12.4 4. Cardiovascular conditions 4.3 5. Respiratory conditions 4.1 6. Other causes 22.0 Represent the information given above graphically Answer: The graphical representation of the given data is as follows Serial Number Causes Female fatality rate (%) 1. Reproductive health conditions 31.8 2. Neuropsychiatric conditions 25.4 3. Injuries 12.4 4. Cardiovascular conditions 4.3 5. Respiratory conditions 4.1 6. Other causes 22.0 Which condition is the major cause of women’s ill health and death worldwide? Answer: From the graph we can see reproductive health conditions is the major cau...