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Three balls are randomly drawn from an urn that contains four white and nine red balls....

Three balls are randomly drawn from an urn that contains four white and nine red balls. (a) What is the probability of drawing a red ball on the third draw? (Round your answer to 3 decimal places.) Correct: Your answer is correct. (b) What is the probability of drawing a red ball on the third draw given that at least one red ball was drawn on the first two draws? (Round your answer to 3 decimal places.]

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Answer #1

a) 0.692

b) 0.629

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