To determine how many people can go to the amusement park, we need to calculate how much money will be left after paying for parking, and then see how many tickets can be bought with the remaining amount.
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Calculate parking cost: \[ \text{Parking cost} = 18 \]
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Subtract parking cost from total budget: \[ \text{Remaining budget for tickets} = 60 - 18 = 42 \]
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Determine the cost of tickets per person: \[ \text{Cost per person} = 10.50 \]
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Calculate how many tickets can be purchased: \[ \text{Number of people} = \frac{\text{Remaining budget for tickets}}{\text{Cost per person}} = \frac{42}{10.50} \]
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Perform the division: \[ \frac{42}{10.50} = 4 \]
Hence, the group of friends can afford to bring 4 people to the amusement park, including themselves.
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