document.write( "Question 1172463: A bag contains 30 white marbles and 30 black marbles. If 8 marbles are chosen,
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Algebra.Com's Answer #797500 by ikleyn(52834)\"\" \"About 
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document.write( "We consider unordered subsets.\r\n" );
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document.write( "The number of all possible unordered 8-marble subsets is  \"C%5B60%5D%5E8\" = \"%2860%2A59%2A58%2A57%2A56%2A55%2A54%2A53%29%2F%281%2A2%2A3%2A4%2A5%2A6%2A7%2A8%29\" = 2558620845.\r\n" );
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document.write( "It is the total space of events in this problem.\r\n" );
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document.write( "The number of all favorable unordered subsets consisting of 2 white and 6 black marbles is  \"C%5B30%5D%5E2\".\"C%5B30%5D%5E6\" = 453*593775 = 258292125.\r\n" );
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document.write( "The probability under the problem's question is  P = \"favorable%2Ftotal\" = \"258292125%2F2558620845\" = 0.10095.      ANSWER\r\n" );
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