Question 1111570
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Here is a quick path to the solution using mental arithmetic and some logical reasoning.<br>
(1) If all 35 tickets had been same day tickets, the total amount paid would have been $700, which is $100 less than the actual total.
(2) Each advance ticket costs $5 more than each same day ticket.
(3) To make the other $100 of the actual total, the number of advance tickets has to be 100/5 = 20.<br>
So there were 20 advance tickets, which means there were 35-20=15 same day tickets.