the mean of five observation 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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The mean of 5 observations is 50. Also, the mean of 4 observations is 45. So, the observation which was removed = 250 − 180 = 70.
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: ANSWER
We have,
The mean of 55 observations is 5050.
⇒⇒ The total sum of 55 observations=50×5=250=50×5=250
Also, the mean of 44 observations is 4545.
⇒⇒ The total sum of 44 observations=45×4=180=45×4=180
So, the observation which was removed =250180=70.
Step-by-step explanation:
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