To get the porbability, first we need to count all the possible answers/solutions in our space.
The first box has 3 plain pencils + 9 pens = 12 items in this space
The second box has 5 color pencils + 3 crayons = 8 items in this space
The probability of getting a plain pencil from the first box could be represented by:

Now, the probability of getting a color pencil from the second box is:
