A box contains 4 blue beads, 2 yellow beads and 6 purple beads. Three beads are taken from the bag, at random, without replacement.
a) What is probability of picking, in order, a blue bead followed
by a yellow bead followed by a purple bead?

[2]
b) Work out the probability that all three beads will be the same colour.
[3]
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c) What is the probability that the three beads will not be the same colour?
[1