You would distribute then combine like terms to get your answer.
Answer:
The question is pretty vague, but I think I know what you are asking.
Step-by-step explanation:
The question states clearly the amount of dice picked that is not black.
Therefore, the equation is as so:
Total amount of dice - Total amount that is black
/
Total amount of dice
Or
10 non-black dice/
15 total dice
The triangle can be isosceles or scalene but not equilateral
