A bag of 100 tulip bulbs purchased from a nursery contains 25 red tulip​ bulbs, 20 yellow tulip​ bulbs, and 55 purple tulip bulbs. ​(a) what is the probability that a randomly selected tulip bulb is​ red? ​(b) what is the probability that a randomly selected tulip bulb is​ purple? ​(c) interpret these two probabilities.