The arithmetic mean of a set of data which contains the number 7 is up 81 if cut to 1 make the average of the rest of the information that the 78 purposely cut out to have much value.
The arithmetic average of the data set, which contains seven of the 81 cuts data if the first number is the average of the 78 data sets, find that the data is cut out to have much value.
The arithmetic average of the data sets, one of which contains information 7 number is 81 if cut the output to 1 amount. The mean of this data set have 78, find out information that was cut off in the much.