document.write( "Question 1189328: a bag contains 5 white and 7 black balls. If 3 are drawn from the bag, What is the probability that:
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document.write( "a) All are white
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document.write( "b) 2 are white and one is black
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document.write( "c) All are of sam colour \n" );
document.write( "
Algebra.Com's Answer #820689 by ikleyn(52835)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "A bag contains 5 white and 7 black balls. If 3 are drawn from the bag \n" ); document.write( "what is the probability that \n" ); document.write( "a) All are white \n" ); document.write( "b) 2 are white and one is black \n" ); document.write( "c) All are of same color \n" ); document.write( "~~~~~~~~~~~~~~~~\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "In the post by @greenestamps, the formulas (2) and (3) should be corrected in this way\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(2) Number of ways of choosing all 3 white (and 0 black): C(5,3)*C(7,0)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(3) Number of ways of choosing 2 white and 1 black: C(5,2)*C(7,1)\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |