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Hey, need help with this: (c) An urn contains ve green balls and seven blue balls. A ball is selected at random and not replaced.

Hey, need help with this:

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(c) An urn contains ve green balls and seven blue balls. A ball is selected at random and not replaced. Another ball is selected. (i) What is the probability that the rst ball is blue ? (ii) What is the probability that the second ball is blue ? (iii) What is the probability that both balls are blue ? (iv) Given the second ball was blue, What is the probability that both balls were blue

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