Six cards are identical except that both sides of two cards are red, both sides of three cards are black

Six cards are identical except that both sides of two cards are red, both sides of three cards are black, and the sixth card has one red side and one black side. One of the six cards is chosen at random and placed on a table. If the upper side of the chosen card is red, what is the probability that the bottom side is black?

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milcah answered 2 years ago

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