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A bag contains 3 red and 7 black balls, two balls are taken out at random without replacement. If the first ball taken out is red, then the probability that the second taken out ball is red: |
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Answer» A bag contains 3 red and 7 black balls, two balls are taken out at random without replacement. If the first ball taken out is red, then the probability that the second taken out ball is red: |
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