the mean of 5 observations is 50.one of the observation was removed from the data hence the mean became 45.find the observation which was removed ?
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Answered by
53
Mean of 5 observations = 50
Sum of 5 observations = 50*5= 250
Mean of 4 observations = 45
Sum of 4 observations = 45*4 = 180
Therefore, the excluded observation = 250-180 = 70
Sum of 5 observations = 50*5= 250
Mean of 4 observations = 45
Sum of 4 observations = 45*4 = 180
Therefore, the excluded observation = 250-180 = 70
Answered by
15
The mean of 5 observation is 50
•°•Sum of 5 observation =5×50=250
The mean of remaining 4 observation is 45(because 1 is removed)
•°•Sum of 4 observation =4×45=180
•°•Observation that was removed=sum of 5 observation - sum of 4 observation
=250 - 180 = 70
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