Question

(13) The mean of 12 observations is15 if 4 is added to each observations then find the new mean

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Answer 1

Answer:

Thus new mean=228/12=19

Step-by-step explanation:

The mean of 12 observations = 15

Sum =12*15=180

Now 4 is added to each observations then sum of 12 observations

=180+numbers added

=180+4*12

=180+48=228

Thus new mean=228/12=19