Sandra is playing in a tennis doubl;es tournament.?

Sandra is playing in a tennis doubles tournament .The rules say that the average age of the pair of players on each side must be ten years old or younger.Sandra is eight years old.Her partner must be ____ years old or younger.Can you show me the solotions of this problem?

Answers:

While playing the table tennis, if i carried the ball with fingers, is it foul or what? 2.and ball carried th?

12 years old or younger because (8+12)/2 equals 10, but I don't think thats what they mean by avg. of ten years old.

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