Q. 203.8( 10 Votes )

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

Answer :

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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