Since a player starts with k points and loses 2 points each time a task is not completed, the player’s score will be k−2n after n tasks are not completed (and no additional points are gained). Since a player who fails to complete 100 tasks has a score of 200 points, the equation 200=k−100(2) must be true. This equation can be solved by adding 200 to each side, giving k=400. Choices A, B, and C are incorrect and may result from errors in setting upor solving the equation relating the player’s score to the number of tasks theplayer fails to complete. For example, choice A may result from subtracting200 from the left-hand side of 200=k−100(2) and adding 200 to the right hand side.