SOLUTION: if the mean of 19 number is 1600. If 2000 number is added Find out the new mean?

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Question 391680: if the mean of 19 number is 1600. If 2000 number is added Find out the new mean?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
The mean of 19 numbers is 1600, so

%28sum%28a%5Bi%5D%2C+i+=+1%2C+19%29%29%2F19+=+1600

sum%28a%5Bi%5D%2C+i+=+1%2C+19%29+=+1600%2A19+=+30400

If we let a%5B20%5D+=+2000, then



The mean of these twenty numbers is just 32400 divided by 20, or 1620.