document.write( "Question 269429: A bag of marbles contains 7 red, 3 blue, 5 white, 3 green.\r
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Algebra.Com's Answer #197471 by edjones(8007)\"\" \"About 
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There are 18 marbles.
\n" ); document.write( "A) 7/18 * 7/18 * 5/18 = .042
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\n" ); document.write( "Combination=nCr=combination of n things taken r at a time.
\n" ); document.write( "(7C2 * 5C1)/3C18
\n" ); document.write( "=(21*5)/816
\n" ); document.write( "=105/816
\n" ); document.write( "=.1287
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