Conditional Probabilityhard
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A box contains 4 red balls and 6 blue balls. You draw two balls one after the other without replacement. Given that the second ball is blue, what is the probability that the first ball was also blue?
A box contains 4 red balls and 6 blue balls. You draw two balls one after the other without replacement. Given that the second ball is blue, what is the probability that the first ball was also blue?