The following table shows monthly pocket expenses of the students of a class. Find out average pocket expenses. {:("Pocket Expenses(Rs.)",20-29,30-39,40-49,50-59,60-69),("Number of Students"," "10," "8," "6," "4," "2):}

The following table shows monthly pocket expenses of the students of a

1.	The following table shows monthly pocket expenses of the students of a class. Find out average pocket expenses. {:("Pocket Expenses(Rs.)",20-29,30-39,40-49,50-59,60-69),("Number of Students"," "10," "8," "6," "4," "2):}
Answer» Solution :CALCULATION of ARITHMETIC mean of inclusive series is the same as of exclusive series. `barX=A+(sumfd')/(sumf)xxC` `=44.5+(-20)/30xx10` `=44.5-20/3` `=445-6.67=37.83` Average Pocket EXPENSES = RS. 37.83.