The mean of 12 observations is 15,if 4 is added to each observation then new mean is
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Given :-
The mean of 12 observation is 15
Solution :-
Given mean of 12 observations is 15
Therefore,
The sum 12 of observations = 12 * 15 = 180
Now,
If each observation is added by 4
Then ,
The no. of observation is added by 4
= 12 * 4 = 48
Now ,
The sum of observation added by 48
180 + 48 = 228
Now,
The mean of the new observation
= 228/ 12 = 19
Hence, The mean of the new observation is 19
Anonymous:
Perfect Answer . Keep it up .
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