9) At a large clothing store, 20% of all purchased items are returned. A random sample of 12 purchases is selected. Find the probability that a) exactly three of the purchased items are returned. b) more than two of the purchased items are returned.
Added by Gary S.
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Given: - \( n = 12 \) (the sample size), - \( p = 0.20 \) (the probability of an item being returned), - \( 1 - p = 0.80 \) (the probability of an item not being returned). Show more…
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