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9709 P61 - Jun 2018 - Q3
2912

Andy has 4 red socks and 8 black socks in his drawer. He takes 2 socks at random from his drawer.

  1. Find the probability that the socks taken are of different colours.

    2. The random variable X is the number of red socks taken.

  2. Draw up the probability distribution table for X.
  3. Find E(X).
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