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Answer:
15 is a composite number
Explanation:
We can form 3 groups of 5 people because:
15 = 3 x 5
So, the model that shows this way to split the teams is:
If we can divide 15 into teams, we can say that 15 is a composite number.
A prime number is a number that is only divisible by 1 and by itself. Since 15 is divisible by 3 because we form 3 teams, we get that 15 is not prime, so it is composite.