[" 28.A box contains "2" white balls,"3"...

[" 28.A box contains "2" white balls,"3" black balls and "4" red "],[" balls.The number of ways of drawing "3" balls from the "],[" box,if atleast one black ball is included,is "],[[" a."36," b."42],[" c."56," d."64]]

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[" 28.A box contains "2" white balls,"3" black balls and "4" red "],[" balls.The number of ways of drawing "3" balls from the "],[" box,if atleast one black ball is included,is "],[[" a."36," b."42],[" c."56," d."64]]

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