Conditional Probabilityhard
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A box contains 5 red balls and 5 blue balls. You draw two balls one by one without replacement. Given that the second ball is red, what is the probability that the first ball was also red?
A box contains 5 red balls and 5 blue balls. You draw two balls one by one without replacement. Given that the second ball is red, what is the probability that the first ball was also red?