Question

The mean of 15 observations is 10. If 2 is subtracted from each observation. Find the new mean?​

Answer 1

Answer:

mean of 27 observations = 35

Sum of 27 observations = 35×27 = 945

If 5 is subtracted from all the observations,

Sum of 27 observations = 945−27×5 = 810

New Mean =

27

810

= 30

Step-by-step explanation:

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