the sum of deviation of a certain number of observation measured from 4 is 72 and the sum of observation of the sum value from 7 is `-3` find the number of observation and their mean​

The algebraic sum of deviations of 10 observations measured from 15 is 7 The mean is

The sum of the deviations of a set of values measured from and the sum of deviations of the values from 46 to 70. Find the values of and the mean.

The sum of deviations of a set of values x_(1), x_(2), x_(3), …… x_(n) measured from 50 is -10 and the sum of deviations of the values from 46 is 70. Find the value of n and the mean.

The means of 5 observations is 16. Find the sum of these observations.

The sum of the deviations of a set of n values x_(1),x_(2),.......x_(n) measured from 50 is -10 and the sum of deviations of the values from 46 is 70. Find the values of n and the mean.

The mean of a data is 15 and the sum of the observations is 195. Find the number of observations in the data.

Find the sum of the deviations of the variate values from their mean.

If the sum of the deviations of 50 observations from 30 is 50, then the mean of these observations is