Final answer:
To find the number of advance tickets sold, subtract the revenue from gate tickets from the total revenue, then divide the remaining revenue by the price of an advance ticket. The number of advance tickets sold is 500.
Step-by-step explanation:
To find the number of advance tickets sold, let's first calculate the total revenue from the gate tickets. We know that the gate tickets sold for $5 each, and 800 tickets were sold, so the total revenue from gate tickets is 5 * 800 = $<<5*800=4000>>4000.
Now, we can subtract the revenue from gate tickets from the total revenue to find the revenue from advance tickets. The total revenue is given as $5500, so the revenue from advance tickets is 5500 - 4000 = $1500.
Since the advance tickets sold for $3 each, to find the number of advance tickets sold, we can divide the revenue from advance tickets by the price of an advance ticket: 1500 / 3 = <<1500/3=500>>500 advance tickets were sold.