A box contains five discs, labelled 1, 2, 4, 5 and 6. In a game a player draws a disc at random, replaces it and then draws again. The player's score is the sum of the numbers on the two discs drawn. Construct a table showing the 11 possible scores and their probabilities. Find the expected score. In a social club this game is played and the prize is 1 for each point scored. The players pay 7.50 each time they play. Find the expected profit to the club after 250 games have been played. (C)