The sixth graders at Harland Middle School put on a Veterans Day fundraiser for the community. They raised a total of $1,187.50 to give to a local veterans charity. If each ticket cost $2.50, how many tickets did they sell?

Let t be the number of tickets they sold.

They sold a total of 2.5t dollars worth of tickets.
So 2.5t=1187.5 dollars.
Therefore, t=1187.5/2.5=<<1187.5/2.5=475>>475 tickets. Answer: \boxed{475}.