[" Two Consecutive class marks of a distsibution are "52" and "57" ."],[" Find the Class limits of the two intervals."]

The two consecutive class marks of a distribution are 52 and 57. Find the class limits of the two intervals.

The class marks of a distribution are 12, 18, 24, 30. Find the class interval.

The class marks of a distribution are 12, 18, 24, 30. Find the class interval.

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

The class marks of a distribution are 62, 67, 72, 77, 82 and 87. Find the class-size and class-limits

Find the class mark of the class 11 to 15.

Find the class mark of the class 40 - 45.

(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