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I figured out the answer: 18+7 = 25, So 25C5 = 53,130 Teams.

This assumes there are no sex restrictions on the teams (for example, "teams must include at least one boy and at least one girl"). That would be a lot more complicated, and if that's a factor you'd need to specify exactly what the restrictions are.

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Q: How many different teams of 5 children can be chosen from a group of 18 girls and 7 boys?
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