I have one red die and a green die. I want to find the probability of rolling at least one 4. Now, because they are 2 different dice, there are 36 possibilities.
- So the first possibility is a 4 from the red and some other number for the green.
- Second possibility is a 4 from the green and some other number for the red.
- Both roll a 4.
So I can clearly see that the answer is 3 ways. However, if I want to arrive at the answer using combinatoric equations, how would I do so?