There are babies in a room: boys and girls. one baby with unknown sex is added. One baby is random selected and it is a boy. What's the probability that the added baby is a boy? You may assume that each gender is equally likely at birth.
There are babies in a room: boys and girls. one baby with unknown sex is added. One baby is random selected and it is a boy. What's the probability that the added baby is a boy? You may assume that each gender is equally likely at birth.
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