A tennis team has 24 members. There are twice as many girls as boys on the team. How many girls are on the tennis team?

Let the number of boys be x. Then there are 2x girls, so the total is x + 2x = 24, or 3x = 24. Thus x = 8 boys, and the number of girls is 2 × 8 = 16. The correct choice is 16 girls.

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