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Three balls are drawn from a bag containing 5 red, 4 white and 3 black balls. The number of ways in which this can be done if at least 2 are red is ______.

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Possible selection can be either '2red and 1 other' or ' 3 red'.

Required number of ways= $^5C_2*^7C_1+^5C_3=10*7+10=80$

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