Arithmetic mean of these items : 10 , 15, X, 20, 30, is 20. Find out the missing item.

Arithmetic mean of these items 5,7,9,15,20 is:

If mean of 10,15,x,20,30 is 20 then find x

A group of 10 items has arithmetic mean 6. If the arithmetic mean of 4 of these items is 7.5, then the mean of the remaining items is

A group of 10 items has arithmetic mean 6. If the arithmetic mean of 4 of these items is 7.5, then the mean of the remaining items is

Following are the observations of a data sample in ascending order. If the mean of the sample is 18.5 and the mode is 15.5, find the missing data items. 12.5 13.8 15.5 x 19.2 20.4 y 23.5 24.6

Arithmetic mean of a series is 15 and if 5 is added in all the items of this series, the new arithmetic mean will be:

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 out the median of the following items : 9,15,12,21,8,17,20