The mean of 5 observations is 12. If a new observation of value 18 is added, what is the new mean?

Topic: Statistics
Subtopic: Mean

A13

B14

C15

D16

Explanation

Sum of 5 observations = 5 * 12 = 60. New sum = 60 + 18 = 78. New mean = 78 / 6 = 13.

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