SOLUTION: pls. help me to answer: if the meanof three numbers is 20 and the mean of five numbers is 12, What is the mean of the eight numbers combined?

Question 1107631: pls. help me to answer: if the meanof three numbers is 20 and the mean of five numbers is 12, What is the mean of the eight numbers combined?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the total of the 3 numbers
Let = the total of the 5 numbers
--------------------------------------------
(1)
(2)
-------------------------
(1)
(1)
and
(2)
(2)
-------------------------
Let = the mean of the 8 numbers

The mean of the 8 numbers is 15

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