 Hello and welcome to the session. In this session we discuss the following question which says make a frequency table from the following. This table is given to us in which we have the marks obtained and the number of students getting those marks. That is more than 50 marks are obtained by 0 students, more than 40 marks are obtained by 10 students, more than 30 marks are obtained by 20 students, more than 20 marks are obtained by 25 students, more than 10 marks are obtained by 35 students and more than 0 marks are obtained by 40 students. And we need to make a frequency table from this given table. Now we move on to the solution. So we have made this table with two columns class and frequency. First we shall extract class from this cumulative frequency table given to us. We consider the first class interval as 0 to 10 that is the marks between 0 and 10. For this we consider the marks obtained more than 0 and the marks obtained more than 10. Now to find out the frequency of this class interval that is to find out the number of students getting the marks between 0 and 10 we will subtract 35 from 40. Since 40 are the number of students getting the marks more than 0 and 35 are the number of students getting the marks more than 10. So to obtain the number of students getting the marks between 0 and 10 we will subtract 35 from 40. So this gives us 5. Now consider the next class interval to be 10 to 20, for this we will consider the marks obtained more than 10 and the marks obtained more than 20 and to get the frequency of the class interval 10 to 20 that is the number of students getting the marks between 10 and 20 we will subtract 25 from 35 so this gives us 10 that is 10 students gets the marks between 10 and 20. Now the next class interval 20 to 30 to get the frequency of this we will consider more than 20 marks obtained and more than 30 marks obtained so to get the frequency of the class interval 20 to 30 we subtract 20 from 25 which gives us 5 so 5 is the frequency of the class interval 20 to 30 this means that 5 students gets the marks between 20 and 30. Now consider the next class interval 30 to 40 for this we consider the marks obtained more than 30 and more than 40 and to get the frequency of the class interval 30 to 40 we will subtract this 10 from 20 this gives us 10 so 10 students gets the marks between 30 and 40. Now the next class interval 40 to 50 for this we will consider the marks obtained more than 40 and more than 50 and to get the frequency of this we will subtract the 0 from 10 which gives us 10. Now as you can see no student gets the marks more than 50 so this completes our frequency table so this is the frequency table that we have obtained from the given cumulative frequency table. So this completes the session hope you have understood the solution for this question.