If the arithmetic mean of the data given below is `20.6,` let us find the value of 'a'

If the arithmetic mean of the data given below is 28 , find (a) the missing frequency , and (b) the median of the series : {:("Profit per Retail Shop (inRs.)",0-10,10-20,20-30,30-40,40-50,50-60),("Number of Retail Shops"," "12," "18," "27," "f," "17," "6):}

Find the mean of the given data:

find the arithmetic mean of the following data.

find the arithmetic mean of the following data.

find the arithmetic mean of the following data.

find the arithmetic mean of the following data.

If the mean of the following data is 20.2, then find the value of p

If the mean of the following data is 20.2, then find the value of p.

If the mean of the following data is 20.2 , then find the value of p.