Question 182255: the average of x,y, and z is 80. IF two of the numbers are 74 and 78, then what is the other number?
Found 2 solutions by solver91311, stanbon:
Answer by solver91311(24713)   (Show Source):
You can put this solution on YOUR website!
If the average of three numbers is 80, then the sum of those three numbers divided by 3 is 80. Multiply 80 times 3, then subtract 74, then subtract 78, what you have left is the third number.
John
Answer by stanbon(75887)  (Show Source):
You can put this solution on YOUR website! the average of x,y, and z is 80. IF two of the numbers are 74 and 78, then what is the other number?
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(74 + 78 + z)/3 = 80
152 + z = 240
z = 88
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Cheers,
Stan H
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