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Please answer these questions. I have them but not the right answer. Please help me with the right one
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2. An envelope contains three cards: a black card that is black on both sides, a white card
that is white on both sides, and a mixed card that is black on one side and white on the
other. You select one card at random and note that the side facing up is black. What is the
probability that the other side is black?
Given that the shown face is black, for the other face to be black, it must be the black
card.
P(B|A) = If the black card is drawn, a black face is shown with probability 1.
P(B) = The total probability of seeing a black face is 1/...