JEE Main2019Math
Q.
If the sum of the deviations of 50 observations from 30 is 50, then the mean of these observations is :
- A
31
- B
30
- C
50
- D
51
Solution
If the sum of the deviations of 50 observations from 30 is 50, then the mean of these observations is :
31
30
50
51