Answer PLS

What information is missing but is needed to solve this problem?


A parking structure has three levels. There are 47 cars on the first level and 61 cars on the third level. How many cars are on the second level?



the average number of cars on the first and third levels

the total number of cars on all three levels

the total number of cars on the first and third levels

the difference between the number of cars on the first and third levels