To find out how much money each person in the group won, first calculate the total amount of the prize that the group receives:
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Calculate \( \frac{1}{5} \) of the $4,500 prize: \[ \frac{1}{5} \times 4500 = 900 \]
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Next, divide this amount by the number of people in the group (9): \[ \frac{900}{9} = 100 \]
Therefore, each person in the group won $100.