The average (arithmetic mean) of A and B is 10, whereas the average of B and 10 is C/2. What is the average of A and C?
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Originally Posted by ceasar_19134 The average (arithmetic mean) of A and B is 10, whereas the average of B and 10 is C/2. What is the average of A and C? This looks like a SAT question. Thus, (1) (2) From (1) subtract (2),
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