SOLUTION: The average of numbers x, y and z is 7 and average of x and y is 5. Value of z is

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Question 552490: The average of numbers x, y and z is 7 and average of x and y is 5. Value of z is

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
(x+y+z)/3 = 7
x+y+z = 21
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(x+y)/2 = 5
x+y = 10
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z = 11