Question

the following table is based on the marks of the first term examination of 10th class student show the information by a histogram also draw a frequency polygon with the help of the histogram class mark of marks =325, 375,425,475,525,575 no. of students = 25,35,45,40,32,20​

Answer 1

Class mark              No. of students                   Co-ordinates

325                                    25                                  (325, 25)

375                                    35                                  (375, 35)

425                                    45                                  (425, 45)

475                                    40                                  (475, 40)

525                                    32                                  (525, 32)

575                                    20                                  (575, 20)

A frequency polygon with the help of the histogram is as shown below.

A frequency polygon is a graph constructed using the lines to join the midpoints of each interval.  

The x-axis represents the class marks with dimension of

1 cm = 50 marks

The y-axis represents the number of students with dimension

1 cm = 10 students