document.write( "Question 469740: An urn contains 10 numbered balls, of which 6 are red and 4 are blue. A sample of 4 balls is to be selected. How many samples contains 2 red and 2 blue balls. \n" ); document.write( "
Algebra.Com's Answer #322244 by edjones(8007)\"\" \"About 
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6C2 * 4C2
\n" ); document.write( "=15*6
\n" ); document.write( "=90 samples contains 2 red and 2 blue balls.
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