Tetsu rides his bicycle x miles the first day, y miles the second day, and z miles the third day. Which of the following expressions represents the average number of miles per day that Tetsu travels?
  1. x + y + z
  2. xyz
  3. 3( x + y + z)
  4. 3( xyz)
  5. ( x + y + z)/3
Explanation
Answer: E - ( x + y + z)/3
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