- average height of player =
Well, you can work that formula the other way round, so that it says:
- total height of players = average height of player x number of players
You know that three of the players have an average height of 6 feet 8 inches. So what is their total height?
Then work out what the total height of all five players will have to be, if their average is going to be 6 feet 4 inches.
Subtract your first answer from the second. Then divide by 2.