" 5.The mean of "5" observation is "16." Flnd the sum of these 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 mean of 15 observations is 16, find the sum of the 15 observations.

If the mean of 10 observations is 15, then the sum of these observations is

If the mean of 12 observations is 9, find the sum of the 12 observations.

If the mean of n observations is 12 and the sum of the observations is 132, then find the value of n.

If the mean of 10 observation is 50 and the sum of the square of the deviations of observation from the mean is 250, then the coefficient of variation of these observation is

If the mean of 10 observation is 50 and the sum of the square of the deviations of observation from the mean is 250, then the coefficient of variation of these observation is