SOLUTION: The mean of four numbers is 12. The mean of three of the numbers is 13. What is the fourth number?
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Question 893205: The mean of four numbers is 12. The mean of three of the numbers is 13. What is the fourth number?
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
(13+13+13+x)/4=12
39+x=12*4
x=48-39
x=9
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