SOLUTION: A, B and C represent 3 numbers. The mean of A, B and C is A. Calculate the mean of B and C. help!

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Question 560410: A, B and C represent 3 numbers. The mean of A, B and C is A. Calculate the mean of B and C.
help!
Found 2 solutions by Edwin McCravy, scott8148:
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
The mean of A, B and C is A. Calculate the mean of B and C.
Given %28A%2BB%2BC%29%2F3 = A, we want to find %28B%2BC%29%2F2

    %28A%2BB%2BC%29%2F3 = A

Multiply both sides by 3:

A + B + C = 3A
 
    B + C = 2A

Divide both sides by 2:

   %28B%2BC%29%2F2 = %282A%29%2F2

   %28B%2BC%29%2F2 = A


Answer:  A

Edwin

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
"The mean of A, B and C is A" ___ (A + B + C) / 3 = A

multiplying by 3 ___ A + B + C = 3A

subtracting A ___ B + C = 2A

dividing by 2 ___ (B + C) / 2 = A