The sum of `( x+ 5 ) ` observations is `( x^(3) + 125)` . Find the mean of the observations.

The sum of (x + 5) observations is x ^(4) - 625. Find the mean of the observations.

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

The mean of 5 observations is 8 , Find the sum of the 5 observations.

If the sum of mode and mean of certain observations is 129 and the median of the observations is 63, then find mode and mean.

If the mean of 15 observations is 16, find the sum of the 15 observations.

The sum of deviations of n observations about 25 is 25 and sum of deviations of the same n observations about 35 is -25. Find the mean of the observations.

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

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

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