CBSE Class 9 Answered
The mean of 8 observations is 40.If 5 is added to each observation then find the value of new mean.
Asked by Chelsea Dhawan | 07 Mar, 2014, 06:54: PM
Expert Answer
Let be 8 observations.
Given that mean of is 40.
So, we have,
So, when 5 is added to each observation, the new mean is
So when a number is added to each observation, the value of new mean is equal to old mean added to the number.
Thus the new mean is 45.
Answered by | 08 Mar, 2014, 06:21: AM
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