Answer:
17 cars
Explanation:
Mike collects toy cars. He decides to put all of his toy cars in a line so that he can count them.
It is given that 9th car in the line ends up being exactly at the middle of the line.
This statement shows that before and after the middle car there were 8 cars.
So the cars in the line is 8 + 1(middle) + 8 = 17 cars
Mike have total 17 cars.