Answer: Ian will put 8 red cars and 6 black cars in each box.
Explanation:
Total red cars=16
Total black cars= 12
Total boxes= 2
To put the same number of each color cars into two boxes, we divide both of them by 2, we get
Number of red cars in each box =

Number of black cars in each box =

Ian will put 8 red cars and 6 black cars in each box.