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Quick prob question
Heres the question:
An urn contains 7 blue balls and 7 red balls. A ball is drawn at random and then replaced, together with another ball of the same colour. What is the prob that in 2 draws, exactly 1 red ball is chosen?
I've got myself in a right mess with this one could anyone give me a hand?
An urn contains 7 blue balls and 7 red balls. A ball is drawn at random and then replaced, together with another ball of the same colour. What is the prob that in 2 draws, exactly 1 red ball is chosen?
I've got myself in a right mess with this one could anyone give me a hand?
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