Question 560410
The mean of A, B and C is A. Calculate the mean of B and C.
<pre>
Given {{{(A+B+C)/3}}} = A, we want to find {{{(B+C)/2}}}

    {{{(A+B+C)/3}}} = A

Multiply both sides by 3:

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

Divide both sides by 2:

   {{{(B+C)/2}}} = {{{(2A)/2}}}

   {{{(B+C)/2}}} = A


Answer:  A

Edwin</pre>