In Statistics, **Ex 14.1 class 10 maths** we will study the three measurement meanings, mean middle and polymer, through classified and unclassified data. We will describe here the cumulative frequency and cumulative frequency table in detail.

**Mean of classified data**

As we have learned in the previous class, to get the mean of the classified data, we need the sum of the figures and the number of figures. As an example, we try to understand it. Suppose the marks obtained by a class of 30 students in a mathematics paper out of 100 are shown through the table given below. Now we have to find the mean of the marks obtained by these students here. The medium that we also call average. Here we will learn in-depth about **NCERT CBSE Solution for** **Ex 14.1 class 10 maths Question 1, 2, 3, 4, 5, 6, 7, 8, 9**

You can see the table depicted on **page number 286** of **chapter 14.1** of your **NCERT Textbook class 10**. Where the marks obtained are shown through xi and the number of students with fi.

**Ex 14.1 Class 10 Maths Question 1.**

A survey was conducted by a group of students as a part of their environment awareness program, 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.

Which method did you use for finding the mean, and why?

Solution for Ex 14.1 Class 10 Maths Question 1

**Ex 14.1 Class 10 Maths Question 2.**

Consider the following distribution of daily wages of 50 workers of a factory.

Find the mean daily wages of the workers of the factory by using an appropriate method.

**Solution for Ex 14.1 Class 10 Maths Question 2**

**Ex 14.1 Class 10 Maths Question 3.**

The following distribution shows the daily pocket allowance of children of a locality. The mean pocket allowance is ₹ 18. Find the missing frequency f.

**Solution for Ex 14.1 Class 10 Maths Question 3**

**Ex 14.1 Class 10 Maths Question 4.**

Thirty women were examined in a hospital by a doctor and the number of heart beats per minute were recorded and summarised as follows. Find the mean heart beats per minute for these women, choosing a suitable method

**Solution for Ex 14.1 Class 10 Maths Question 4**

**Ex 14.1 Class 10 Maths 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.

Find the mean number of mangoes kept in a packing box. Which method of finding the mean did you choose?

**Solution for Ex 14.1 Class 10 Maths Question 5**

**Ex 14.1 Class 10 Maths Question 6.**

The table below shows the daily expenditure on food of 25 households in a locality.

Find the mean daily expenditure on food by a suitable method.

**Solution for Ex 14.1 Class 10 Maths Question 6**

**Ex 14.1 Class 10 Maths Question 7.**

To find out the concentration of 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:

Find the mean concentration of in the air.

**Solution for Ex 14.1 Class 10 Maths Question 7**

**Ex 14.1 Class 10 Maths 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.

**Solution for Ex 14.1 Class 10 Maths Question 8**

**Ex 14.1 Class 10 Maths Question 9.**

The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate.

**Solution for Ex 14.1 Class 10 Maths Question 9**