Find the class-marks of the class interval 10-25.

Find the class mark of the class 80-90.

Find the class mark of the class 10 -20.

Find the class-mark of 80-90.

(i)Find the class mark of the class 90-120. (ii)In a frequency distribution, the mid-value of the class is 10 and width of the class is 6. Find the lowe limit of the class. (iii)The width of each of the five continuous classes in a frequency distribution is 5 and lowe class limit of the lowest class is 10. What is the upper class limit of the highest class? (iv) The class marks of a frequency distribution are 15,20,25...... Find the class corresponding to the class mark 20. (v)In the class intervals 10-20, 20-30, find the class in which 20 is included.

Class mark of class interval 60–70 is

The class mark of the class interval 4.7-6.3 is _______.

Find the class marks of the classes 15 - 35 and 45 - 60.

Find the class marks of classes 10-25 and 35-55.

Find the class marks of classes 10-25 and 35-55.

From the following frequency table. Find : (a) The frequency of fifth class interval (b) The upper class limit of third class interval. (c) The lower class limit of second class interval. (d) The class mark of sixth class interval.