The frequency distributions of the quantity (in quintals) of producing cokes from a coke mine in 100 days are given below. Find the arithmetic mean.

The frequency distritubution of the monthly salaries of 80 workers of a company are given below. Find the arithmetic mean of the salaries of the workers

The frequency distribution of the monthly incomes (in rupees) of the workers of a small industry are given below. Find the average of their incomes .

The frequency distribution of the number of accidents in 30 consecutive days in a city are given below. Find the arithmetic mean.

The weights (in Kg) and their frequency distribution of 100 students are given below. Find their arithmetic mean.

The frequency distribution of the family members of 65 families are given below. Find the arithmetic mean.

Profit of 100 shops in village are given below. find mean profit?

In a telephone exchange , the frequency distribution of the number of telephone calls per minute for any hour are given below : find the average number of telephone calls.

The frequency distribution of the diameters (in mm) of 80 pipes are given below. Find their arithmetic mean, assuming 22 as the origin.

The frequency distributions of the weekly wages of some labourers of an industry are given below : The number of labourers having Rs. 25 weekly wages is unknown. But it is known that the average weekly wages of a labourer is Rs. 27.50 . Find the unknown frequency .

In the following table the prices of salt per quintal of secen days of a market in Kolkata are given . Find the arithmetic mean of the table by transferring the origin at 300.