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1.A survey of adults in a certain large town found that 76% of people wore a watch on their left wrist, 15% wore a watch
1.A survey of adults in a certain large town found that 76% of people wore a watch on
their left wrist, 15% wore a watch on their right wrist and 9% did not wear a watch at all.
a.A random sample of 10 adults was taken. Find the probability that more than 2 adults did not wear a watch.
b.A random sample of 200 adults was taken. Using a suitable approximation, find the probability that more than 20 wore a watch on their right wrist.
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