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Of 20 rats in a cage 12 are males and 9 are infected with a

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Of 20 rats in a cage, 12 are males and 9 are infected with a virus that causes hemorrhagic fever. Of the 12 male rats, 7 are infected with the virus. One rat is randomly selected from the cage.

(a) If the selected rat is found to be infected, what is the probability that it is female?

Reference no: EM13577087

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