A bag contains 12 blue discs, 8 red discs and 6 green discs.
i If a disc is drawn at random from the bag, what is the probability:
a it is green? b it is red? c it is not blue?
ii If a disc is drawn at random and not replaced then another disc is drawn at random, what is
the probability that the second disc is blue, given that the first disc was also blue?