document.write( "Question 306608: Suppose there are 10 balls in an urn, 4 blue,4 red , 2 green. The balls are also numbered 1 to 10. How many ways are there to select an ordered sample of 4 balls without replacement such that there are 2 blue balls and 2 red balls in the sample? \n" ); document.write( "
Algebra.Com's Answer #219393 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Suppose there are 10 balls in an urn, 4 blue,4 red , 2 green. The balls are also numbered 1 to 10. How many ways are there to select an ordered sample of 4 balls without replacement such that there are 2 blue balls and 2 red balls in the sample? \n" ); document.write( "--- \n" ); document.write( "# of ways to select 2 blue balls: 4C2 = 6 \n" ); document.write( "# of ways to select 2 red balls:: 4C2 = 6 \n" ); document.write( "------------------- \n" ); document.write( "# of ways to select 4 random balls from 10 : 10C4 = 210 \n" ); document.write( "============= \n" ); document.write( "P(2 blue and 2 red) = (6*6)/210 = 36/210 = 0.17 \n" ); document.write( "==================================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |