You are in the middle of a Tetris game and you have two pieces left until proceeding to the next level. The board currently looks like this:
Your goal is to complete the four rows with the last two Tetris pieces. The seven available Tetris pieces are shown below. What are your chances of completing the four rows in the next two turns? It should be noted that the pieces can be rotated and that the chances each piece coming up are equally likely.
