Answer: 270
Step-by-step explanation:
I might be wrong on this one, but the average license plate is 12 in by 6 in. One meter is around 3 feet. The dimensions of the wall are 9 feet by 15 feet.
Length wise, 15 license plates can fit on the wall, and bright wise, 18 can fit on the wall.
15 times 18 = 270
270 license plates is your answer