A parking lot contains 160 vehicles. Each vehicles is either a car or a truck, and each vehicle is either red or green. 70 vehicles are red and 120 vehicles are cars. If there are 18 green trucks, how many red cars are there?
Step-by-step Solution:
To calculate the number of red cars, we can use the following steps:
Calculate the number of green cars:
* Total vehicles = 160
* Red vehicles = 70
* Green vehicles = 160 - 70 = 90
* Cars = 120
* Green cars = 90 - 18 (green trucks) = 72
Calculate the number of red cars:
* Total cars = 120
* Green cars = 72
* Red cars = 120 - 72 = 48
Therefore, there are 48 red cars in the parking lot.