A cooler at a picnic contains 100 cans of soda covered by ice. There are
20 cans of cola,
48 cans of orange soda,
21 cans of ginger ale, and
11 cans of root beer. The cans are all the same size and shape. If one can is selected at random from the cooler, determine the probability that the soda selected is
cola, root beer, or ginger ale