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(a) A bag contains a large number of beads of which 40% are yellow. A random sample of 20 beads are taken from the bag.
(a) A bag contains a large number of beads of which 40% are yellow. A random sample of 20 beads are taken from the bag. Calculate the probability that the sample contains: (i) fewer than 12 yellow beads; (ii) exactly 12 yellow beads
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