NCERT class 10 maths chapter 14 Statistics
Question 1:A survey was conducted by a group of students as a part of their environment awareness programme, in which they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house. Number of plants 0 - 2 2 - 4 4 - 6 6 - 8 8 - 10 10 - 12 12 - 14 Number of houses 1 2 1 5 6 2 3 Which method did you use for finding the mean, and why?
Exercise 14.1 maths class 10 Chapter 14 Statistics
Question 2:Consider the following distribution of daily wages of 50 workers of a factory. Daily wages (in `) 500 - 520 520 -540 540 - 560 560 - 580 580 -600 Number of workers 12 14 8 6 10 Find the mean daily wages of the workers of the factory by using an appropriate method.
CBSE class 10 maths ncert solutions Chapter 14
Question 3:The following distribution shows the daily pocket allowance of children of a locality. The mean pocket allowance is Rs 18. Find the missing frequency f.
class 10 maths solutions Statistics
Question 4:Thirty women were examined in a hospital by a doctor and the number of heartbeats per minute were recorded and summarised as follows. Find the mean heartbeats per minute for these women, choosing a suitable method. Number of heartbeats 65 - 68 68 - 71 71 - 74 74 - 77 77 - 80 80 - 83 83 - 86 per minute Number of women 2 4 3 8 7 4 2
NCERT class 10 chemistry chapter 14 exercise solutions
Question 5:In a retail market, fruit vendors were selling mangoes kept in packing boxes. These boxes contained varying number of mangoes. The following was the distribution of mangoes according to the number of boxes. Number of mangoes 50 - 52 53 - 55 56 - 58 59 - 61 62 - 64 Number of boxes 15 110 135 115 25 Find the mean number of mangoes kept in a packing box. Which method of finding the mean did you choose?
Statistics class 10 ncert solutions
Question 6:The table below shows the daily expenditure on food of 25 households in a locality. Daily expenditure 100 - 150 150 - 200 200 - 250 250 - 300 300 - 350 (in `) Number of 4 5 12 2 2 households Find the mean daily expenditure on food by a suitable method.
class 10 Maths NCERT Solutions Chapter 14 Statistics Exercise 14.1
Question 7:To find out the concentration of SO2 in the air (in parts per million, i.e., ppm), the data was collected for 30 localities in a certain city and is presented below: Concentration of SO2 (in ppm) Frequency 0.00 - 0.04 4 0.04 - 0.08 9 0.08 - 0.12 9 0.12 - 0.16 2 0.16 - 0.20 4 0.20 - 0.24 2 Find the mean concentration of SO2 in the air.
Exercise 14.1 class 10 Math ncert solutions Chapter 14
Question 8:A class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days a student was absent. Number of 0 - 6 6 - 10 10 - 14 14 - 20 20 - 28 28 - 38 38 - 40 days Number of 11 10 7 4 4 3 1 students
Question 9:The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate. Literacy rate (in %) 45 - 55 55 - 65 65 - 75 75 - 85 85 - 95 Number of cities 3 10 11 8 3