A bag of 100100 tulip bulbs purchased from a nursery contains 4040 red tulip​ bulbs, 4040 yellow tulip​ bulbs, and 2020 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.