A bag of 31 tulip bulbs haves 13 red tulip bulbs, 11 yellow tulip bulbs, and 7 purple tulip bulbs.
(a) Determine the probability that two randomly selected tulip bulbs are both red?
(b) Determine the probability that the first bulb selected is red and the second yellow?
(c) Find out the probability that the first bulb selected is yellow and the second red?
(d) Determine the probability that one bulb is red and the other yellow?