The mean of 100 observations is 50. If one of the observations 50 is replaced by 150, the resulting mean will be
(a) 50.5
(b) 51
(c) 51.5
(d) 52
Open in App
Solution
(b) 51
Mean of 100 observations = 50
Sum of 100 observations =
It is given that one of the observations, 50, is replaced by 150.
∴ New sum = (5000 50 + 150) = 5100
And,