Solve Q.1 by step deviation method.

A frequency distribution of funds collected by 120 workers in a company for the drought affected people are given in the following table.Find the mean of the funds by 'step deviation' method.

A frequency distribution of funds collected by 120 workers in a company for the drought affected people are given in the following table. Find the mean of the funds by 'step deviation' method.

A frequency distribution of funds collected by 120 workers in a company for the drought affected people are given in the following table. Find the mean of the funds by 'step deviation' method.

Find the mean of the following table by step deviation method :

The makes obtained by 30 students are given in the following table. Find their mean by step deviation method :

The following table gives the life time of 200 bulbs. Calculate the mean life time of a bulb by step deviation method :