In a family with 6 children, excluding multiple births, what is
the probability of having exactly 2 girls?
Assume that having a boy is as likely as having a girl at each
birth.
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A biotechnology company produced 201 doses of somatropin,
including 9 which were defective. Quality control test 15 samples
at random, and rejects the batch if any of the random samples are
found defective. What is the probability that the batch gets
rejected?
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A math professor...