Patrick bought 2 tickets at $100.00 each for a total of 2*100 = $<<2*100=200.00>>200.00

The oldest son went 35 times and the youngest went 15 times for a total of 35+15 = <<35+15=50>>50 trips

The tickets cost $200.00 and together, the boys went to the park 50 times so each trip cost 200/50 = $<<200/50=4.00>>4.00

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Patrick buys a season pass for each of his sons to visit the local amusement park as often as they want.  The passes were $100.00 each.  The oldest son went to the park 35 times over the summer and the youngest went 15 times.  What was the cost per trip to the park?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
4
Patrick buys a season pass for each of his sons to visit the local amusement park as often as they want.  The passes were $100.00 each.  The oldest son went to the park 35 times over the summer and the youngest went 15 times.  What was the cost per trip to the park?
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