The mean of `9` observations is `15` .If one more observation is added to the series,the mean becomes `16` .The value of `10` th observation is

The mean of 10 observation is 15. If one observation 15 is added, then find the new mean.

The mean of 5 observations is 3 and if one more observation is added, the mean becomes 3 . 5. Find out the value of new observation .

The mean of 10 observations is 15. If one observation 15 is added, then the new mean is 16 (b) 11 10 (d) 15

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

The mean weight of 9 items is 15. If one more item is added to the series the mean becomes 16.The value of 10 th item is (a) 35 (b) 30 (c) 25 (d) 20