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

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

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.

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

If the mean of observations is 12 and the sum of the observations is 132, then the value of is (a) 9 (b) 10 (c)11 (d) 12

If the mean of observations is 12 and the sum of the observations is 132, then the value of number of terms is (a) 9 (b) 10 (c)11 (d) 12

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

If the mean of 10 observations is 12, what is their sum?

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