Final answer:
There are 90 different color-trim schemes available.
Step-by-step explanation:
To find the number of different color-trim schemes available, you need to multiply the number of options for each category. In this case, there are 6 exterior colors, 5 interior colors, and 3 trims. Multiply these numbers together: 6 x 5 x 3 = 90. Therefore, there are 90 different color-trim schemes available.