A fair coin is tossed 3 times. On each toss it is observed whether Heads or Tail came up. Consider the sets:
S1 ={1 Heads, 2 Heads, 3 Heads}
S2 = {at least 1 Heads, at least 1 Tails}
S3 = {more Head than Tails, more Tails then Heads}
Which one of these sets could be used as a Sample Space for this experiment?