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

Find the actual lower and upper class limits and also the class marks of the classes : 1.1 - 2.0, 2.1 - 3.0 and 3.1 - 4.0.

The mark of the class 90-120 is

Construct a frequency table for the following weights (in gm) of 35 mangoes using the equal class intervals, one of them is 40-45 (45 not included): 30,40,45,32,43,50,55,62,70,70,61,62,53,52,50,42,35,37,53, 55,65,70,73,74,45,46,58,59,60,62,74,34,35,70,68 What is the class marks of the class interval 40-45? What is the range of the above weights? How many classes are there?

Use the table given below to find : The class marks of the third class.

In a frequency distribution, the mid values of a class is 10 and width of the class is 6 . The lower limit of the class is

Given below are the marks obtained by 30 students of a class, Using the class intervals of equal class size in which one class interval is 30-40 (excluding 40), construct a frequency table. {:(42,74,39,48,42,80,35,38,52,81),(31,72,65,58,77,82,79,65,47,30),(64,56,39,48,60,63,72,50,46,35):}

In the half yearly examination of class IX of a school, the mean marks scored by the boys is 52 and the mean marks scored by the girls is 48. If on the whole, the mean marks of the calss is 50.5, find the ratio of the number of boys to the number of girls in the class.

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.

The class marks of a distribution are: 17,52,57,62,67,72,77,82,87,92,97,102 Determine the class size, the class limits and the true class limits