Specific englishman and specific frenchman
In how many manners can committee of 2 Englishmen, 2 Frenchmen, 1 American be selected form 6 Englishmen, 7 Frenchmen, 3 American? In how many of these manners do a specific Englishman and specific Frenchman belong to the committee?
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A drug is taken off market because of side effect that upon rare occasions causes paralysis or death. Previous experience points out that in large population about 7 people upon average react to drug in this manner. Determine the probability that
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