Question

the mean of 25 observations is 16. if 4 is added to the each first 10 observations, what is the mean of the new 25 observations?
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Answer 1

Step-by-step explanation:

given:

the mean of 25 observations is 16. if 4 is added to the each first 10 observations, what is the mean of the new 25 observations?

to find :

what is the mean of the new 25 observations?

solution :

Mean of 25 observations =16

Sum of 25 observations =25*16=400

After adding 4 to first 10 observations, new sum = 400+4×10=440

Thus, new mean =. 25, 440

= 17.6