document.write( "Question 98621: QUESTION: There are 8 red, 3 blue, and 12 black marbles in a bag. If 3 are selected, what is the probability that all are red or all are blue?\r
\n" ); document.write( "\n" ); document.write( "WHAT I HAVE:
\n" ); document.write( "8/23 * 7/22 * 6/21 + 3/23 * 2/22 *1/21 = 336/10626 + 6/10626 = 57/1771
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Algebra.Com's Answer #71764 by Nate(3500)\"\" \"About 
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There are 23 marbles in all ...
\n" ); document.write( "Chances of selecting a red ball: 8/23
\n" ); document.write( "Chances of selecting a red ball again: 7/22
\n" ); document.write( "Chances of selecting a red ball once more: 6/21
\n" ); document.write( "(8/23)(7/22)(6/21) = 336/10,626 = 168/5,313 = 56/1,771
\n" ); document.write( "There are 23 marbles in all ...
\n" ); document.write( "Chances of selecting a blue ball: 3/23
\n" ); document.write( "Chances of selecting a blue ball again: 2/22
\n" ); document.write( "Chances of selecting a blue ball once more: 1/21
\n" ); document.write( "(3/23)(2/22)(1/21) = 6/10,626 = 1/1,771
\n" ); document.write( "56/1,771 + 1/1,771 = 57/1,771
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