To find the probability of Nicole pulling a red marble out of the bowl, we need to first determine how many red marbles are in the bowl.
There are a total of 120 marbles in the bowl.
Of these, 80 are black, 28 are white, which means that there are (120 - 80 - 28) = 12 red marbles in the bowl.
Therefore, the probability of Nicole pulling a red marble is:
(number of red marbles) / (total number of marbles) = 12 / 120 = 1 / 10 = 0.1
So, the probability is 0.1 or 10%.