document.write( "Question 248546: a bag has 2 red martbles 3 green marbles and 1 blue marble. if you randomly take out 2 marbles at once whats the probability of getting a blue and a green marble? \n" ); document.write( "
Algebra.Com's Answer #181145 by edjones(8007)\"\" \"About 
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nCr=n!/((n-r)r!) Combination of n things taken r at a time.
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\n" ); document.write( "2C6=15 all marbles
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\n" ); document.write( "1C1=1 blue
\n" ); document.write( "3C1=3 green
\n" ); document.write( "2C0=1 red
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\n" ); document.write( "(1*3*1)/15= 1/5 probability of getting a blue and a green.
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