Seven Black Balls and Five White Balls Are Placed in an Urn

Essay

Seven black balls and five white balls are placed in an urn. Two balls are then drawn in succession.
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Give your answers in fraction form.
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What is the probability that the second ball drawn is a white ball if the second ball is drawn without replacing the first?
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__________
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What is the probability that the second ball drawn is a white ball if the first ball is replaced before the second is drawn?
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__________