A box contains 4 blue beads, 2 yellow beads and 6 purple beads. Three beads are taken from the bag, at random, without replacement. Work out the probability that the beads will be the same colour.
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Total outcomes are 4+2+6=12
Pb=prbabilty of blue =4/12=1/3
Py=2/12=1/6
Pp=6/12=1/2
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