Calculate the arithmetic mean of the following frequency distribution by Direct Method: {:("Class Interval",10-20,20-40,40-70,70-120,120-200),("Frequency"," "4," "10," "26," "8," "2):}

Calculate the arithmetic mean of the following frequency distribution

1.	Calculate the arithmetic mean of the following frequency distribution by Direct Method: {:("Class Interval",10-20,20-40,40-70,70-120,120-200),("Frequency"," "4," "10," "26," "8," "2):}
Answer» ANSWER :ARITHMETIC MEAN = 57.4