Q20 of 174 Page 597

The mean of 100 observations is 50. If one of the observations 50 is replaced by 150, the resulting mean will be

Given:


No. of observations = 100


Mean of them = 50


Sum of observations = 100 × 50 = 5000


It is given that one of observation 50, is replaced by 150.


New sum = 5000 – 50 + 150 = 5100.


Resulting mean =

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