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Unformatted text preview: at least 1 of them has Onegative blood? b) If 12 people appear at random to give blood, what is the probability that at least 2 of them have Onegative blood? c) If 12 people appear at random to give blood, what is the probability that exactly 2 of them have Onegative blood?...
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 Fall '08
 ABDUS,S.

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