document.write( "Question 1135954: There is a bag filled with 3 blue, 4 red and 5 green marbles.
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document.write( "A marble is taken at random from the bag, the colour is noted and then it is not replaced.
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document.write( "Another marble is taken at random.
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document.write( "What is the probability of getting exactly 1 blue? \n" );
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Algebra.Com's Answer #753670 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! first only blue is 3/12*9/11 or 27/132 \n" ); document.write( "second only blue is 9/12*3/11 or 27/132 \n" ); document.write( "the probability is 54/132 or 0.409\r \n" ); document.write( "\n" ); document.write( "should be complement of no blue (9/12)(8/11) or 72/132 \n" ); document.write( "plus both blue (3/12)(2/11) or 6/132, and it is. \n" ); document.write( " |