All Cups Right-Side Up Problem

#80

You have three cups, one of which is placed upside down and the other two are right-side up. Your goal is to turn all cups right-side up in no more than seven moves. The only restriction is that you have to turn over exactly two cups at each move.
How is it possible??? 
And in how many moves???

  Difficulty Level - 5/5

  For Solution : Click Here     
  For Hint : Click Here