The Christmas Tree Store has a parking lot that will hold l,000 vehicles. 2/5 of the spaces are for cars. When you went to buy your tree, there were 200 cars and some trucks in the parking lot. The parking lot was 3/4 full. How many trucks were in it?

400 car spaces and 600 truck spaces

200 cars + x trucks = 750
x = 550 trucks

To find the number of trucks in the parking lot, we first need to determine how many parking spaces are allocated for cars and trucks.

Given that 2/5 of the spaces are for cars, we can calculate:
Number of car spaces = (2/5) * 1000 = 400 spaces

Since the parking lot was 3/4 full, we can determine the number of occupied spaces by multiplying 3/4 by the total number of spaces:
Occupied spaces = (3/4) * 1000 = 750 spaces

Out of these occupied spaces, 200 were cars. Thus, the remaining occupied spaces are for trucks:
Occupied spaces for trucks = Occupied spaces - Number of car spaces = 750 - 200 = 550 spaces

Therefore, there were 550 trucks in the parking lot.