The mean of 100 observation is 50 the observation which was 50 is replaced by150 find the resulting mean
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Mean=50
Mean = sum of observations /total
observations
50 = sum / 100
Sum = 100×50
= 5000
Actual.sum = 5000 - 50 = 4950
As 50 is replaced by 150
Therefore 4950 +150 = 5100
Mean = 5100/100
= 51
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