A cooler contains 100 ice cream bars. There are 20 Vanilla bars, 30 Mint Chocolate Chip bars, 40 Chocolate bars, and 10 Rocky Road bars. If one bar is selected at random from the cooler, determine the probability that the bar selected is Chocolate, Vanilla, or Rocky Road.
The probability that the bar selected is Chocolate, Vanilla, or Rocky Road is____(Type an integer or a simplified fraction.)