If a = (1/2)b and c = 3a, then which of the following represents the average (arithmetic mean) of a, b, and c, in terms of a ?
Choose the correct choice from the following
A) 2a B) 3a C) 4a D) 5a E) a/2
a = (1/2)b --&gt; b=2a.   The mean = (a + b + c)/3 = (a + 2a + 3a)/3 = 2a.   2answer is 2a
<result>A</result>
If a = (1/2)b and c = 3a, then which of the following represents the average (arithmetic mean) of a, b, and c, in terms of a ?