Answer:
C. 468mm²
Step-by-step explanation:
The formula for the surface area of rectangular prism is:

Let's break down our variables.
L = 12mm
W = 6mm
H = 7mm + 2mm = 9mm
Now we substitute our values in the formula:
1, 3, 5, 7, 9 are the possible digits
meaning you have 5! possible combinations or 120 combinations
Answer: 
<u>Step-by-step explanation:</u>
1st marble and 2nd marble
