The following table gives the information about the number of students in different standards of a school :

Represent the data by a Bar graph.

The following table gives the distribution of students of two sections according to the marks obtained by them: Represent the marks of the students of both the sections on the same graph by two frequency polygons. From the two polygons compare the performance of the two sections.

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.

Consider the marks obtained (out of 100 marks) by 30 students of Class IX of a school : Represent this data in a frequency distribution table

A class has 175 students. The following table shows the number of students studying one or more of the following subjects in this case. How many students are enrolled in Mathematics alone, Physics alone and Chemistry alone? Are there students who have not offered any one of these subjects?

The donations given to an orphanage home by the students of different classes of a secondary school are given below. Find the mean, median and mode of the data.

The following data gives the information on the observed lifetime (in hours) of 225 electrical components : {:("Lifetime (in hours) ",0-20,20-40,40-60,60-80,80-100,100-120),("Frequency "," "10," "35," "52," "61," "38," "29):} Determine the modal lifetime of the components :

The heights of 50 students, measured to the nearest centimetres, have been found to be as follows: (i) Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160 - 165,165-170, etc. (ii) What can you conclude about their heights from the table ?