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Solved (Free): About 75% of dog owners buy holiday presents for...
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About 75% of dog owners buy holiday presents for their dogs. ^1 Suppose n=4 dog owners are randomly selected. Find the probability that
(a) three or more buy their dog holiday presents.
(b) at most three buy their dog holiday presents
(c) Find the expected number of persons, in the sample, who buy their dog holiday presents
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