I am confused in determining the all possible outcome of coin tossing. all possible outcome of tossing three coin is given by 2^3. My confusion is why cannot it be considered it as a bag consisting of 6 balls T1, H1 (Coin 1 or trial 1); T2, H2 (Coin2 or trial 2); T3, H3 (Coin3 or trial 3) where T & H are the heads and tails side of the coin. Now from this bag all the possible combinations of three balls is given by combination formula which will be 20 such combinations. What is that am missing between both the experiment. Any help would be grateful.