It depneds on what the game is. If it is football, Basketball, tennis, and some other games, there is just one ball on the floor at any one time. If the game is pool, there are 15 balls plus the cue ball. Other games played with balls may have other numbers of balls.
ten frames If you are talking about tenpin Bowling then each player will bowl between 12 and 21 balls depending on whether you get spares or strikes.
60-75
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ten frames If you are talking about tenpin Bowling then each player will bowl between 12 and 21 balls depending on whether you get spares or strikes.
The Host Team and the visiting team each provides 12 balls per game. The balls are inspected before the game to ensure that they meet specifications. Of course each team also has many "non-game" practice balls on hand.
Each player starts with 12 pieces.
There are no grey balls in a standard game of snooker.
There are six balls in an over.
10
Depending upon the game, there are from 7 to 21 colored balls.
ten frames If you are talking about tenpin Bowling then each player will bowl between 12 and 21 balls depending on whether you get spares or strikes.
There is no game of pool practice, so there are no red balls. The 3 and 11 balls are red in the game of pool however.