[" 7An urn contains "6" balls of which t...

[" 7An urn contains "6" balls of which two are red and four are black.Two balls "],[" are drawn at random.Probability that they are of the different colours is "],[[" (a) "(2)/(5)(b),(1)/(15)(c)(8)/(15)(d)(4)/(15),," (cthe different colours is "]]

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[" 7An urn contains "6" balls of which two are red and four are black.Two balls "],[" are drawn at random.Probability that they are of the different colours is "],[[" (a) "(2)/(5)(b),(1)/(15)(c)(8)/(15)(d)(4)/(15),," (cthe different colours is "]]

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