Jenny has played five games for her school netball team. In these games she scored 7, 11, 12, 8 and 4 goals, respectively. There is one more game to play this year. How many goals will she need to score in the last game to average 9 goals per game for the season?
Solution
To average 9 goals she will need to score 9 × 6 = 54 goals altogether.
In her first 5 games she has scored 7 + 11 + 12 + 8 + 4 = 42. So she will need to score 12 goals in the last game.
Extension
What is the lowest average that Jenny can get for the season? How many goals does she need to score to average 10 goals per game?