Calculate the AM of the following data using short-cut method .

Find the AM of the following data by short-cut method. {:("Class Interval",f),(" "1-5,5),(" "6-10,10),(" "11-15,15),(" "16-20,10),(" "21-25,5):}

Find the mean from the following table using short cut method :

Find the mean from the following table using short cut method :

Find the mean from the following table using short cut method. :

Find the mean from the following table using short cut method. :

Calculate the Arithmetic mean of the following data using step deviation method.

Calculate the mean of the following data by step devaition method.

Find mean of the following distribution using short cut method: