SOLUTION: The averagr of x and y is 40. If z= 10, what is the average of x,y and z??

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Question 1008941: The averagr of x and y is 40. If z= 10, what is the average of x,y and z??
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
If the average of x and y is 40, their sum must be 80.
If z = 10, then the sum of x, y, and z is 90.
Then the average is 90/3 = 30.